Palladium‐Boride Nanoflowers with Controllable Boron Content for Formic Acid Electrooxidation DOI
Yiming Liu,

Bo‐Qiang Miao,

Han‐Yue Yang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 2, 2024

Abstract The rational design of the electronic structure and elemental compositions anode electrocatalysts for formic acid electrooxidation reaction (FAOR) is paramount realizing high‐performance direct fuel cells. Herein, palladium‐boride nanoflowers (Pd‐B NFs) with controllable boron content are rationally designed via a simple wet chemical reduction method, utilizing Pd II ‐dimethylglyoxime as precursor NaBH 4 both reductant source. Pd‐B NFs can be regulated through manipulation time, accompanying crystal phase transition from face‐centered cubic to hexagonal close‐packed within parent lattice. obtained exhibit increased FAOR mass specific activity increasing content, showcasing remarkable inherent stability anti‐poisoning capability compare commercial platinum (Pt) nanocrystals. Notably, sample reacted 12 h reveals high (31.5 A m −2 ), which approximately two times higher than Density functional theory calculations disclose that d‐sp orbital hybridization between B modifies surface d ‐band properties Pd, thereby optimizing adsorption key intermediates facilitating kinetics on surface. This study paves way toward utilization metal boride‐based materials synthesis methods various electrocatalysis applications.

Language: Английский

Optimizing Pt-Based Alloy Electrocatalysts for Improved Hydrogen Evolution Performance in Alkaline Electrolytes: A Comprehensive Review DOI

Guoliang Gao,

Guang Zhu, Xueli Chen

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 17(21), P. 20804 - 20824

Published: Nov. 3, 2023

The splitting of water through electrocatalysis offers a sustainable method for the production hydrogen. In alkaline electrolytes, lack protons forces dissociation to occur before hydrogen evolution reaction (HER). While pure Pt is gold standard electrocatalyst in acidic since 5d orbital nearly fully occupied, when it overlaps with molecular water, generates Pauli repulsion. As result, formation Pt–H* bond an environment difficult, which slows HER and negates benefits using catalyst. To overcome this limitation, can be alloyed transition metals, such as Fe, Co, Ni. This approach has potential not only enhance performance but also increase dispersion decrease its usage, thus overall improving catalyst's cost-effectiveness. excellent adsorption ability metals contributes generation proton-rich local near Pt-based alloy that promotes HER. Significant progress been achieved comprehending mechanism manipulation structure composition electrocatalysts based on alloy. objective review analyze condense latest developments It focuses modified alloys clarifies design principles catalytic catalysts from both experimental theoretical perspective. highlights some difficulties encountered during opportunities increasing performance. Finally, guidance development more efficient provided.

Language: Английский

Citations

85
Why do Single‐Atom Alloys Catalysts Outperform both Single‐Atom Catalysts and Nanocatalysts on MXene? DOI Open Access

Shuyan Guan,

Zhenluo Yuan,

Zechao Zhuang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(4)

Published: Dec. 1, 2023

Abstract Single‐atom alloys (SAAs), combining the advantages of single‐atom and nanoparticles (NPs), play an extremely significant role in field heterogeneous catalysis. Nevertheless, understanding catalytic mechanism SAAs catalysis reactions remains a challenge compared with single atoms NPs. Herein, ruthenium‐nickel (RuNi ) synthesized by embedding atomically dispersed Ru Ni NPs are anchored on two‐dimensional Ti 3 C 2 T x MXene. The RuNi SAA‐3 −Ti catalysts exhibit unprecedented activity for hydrogen evolution from ammonia borane (AB, NH BH hydrolysis mass‐specific (r mass value 333 L min −1 g . Theoretical calculations reveal that anchoring optimizes dissociation AB H O as well binding ability H* intermediates during due to d‐band structural modulation caused alloying effect metal‐supports interactions (MSI) This work provides useful design principles developing optimizing efficient hydrogen‐related demonstrates over energy

Language: Английский

Citations

77
Recent advances in Ru/Ir-based electrocatalysts for acidic oxygen evolution reaction DOI Creative Commons

Guoliang Gao,

Zixu Sun, Xueli Chen

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 343, P. 123584 - 123584

Published: Dec. 1, 2023

The electrocatalytic process of water splitting offers a promising approach to produce sustainable hydrogen. However, the slow kinetics oxygen evolution reaction (OER) presents notable challenge, especially in acidic environment proton exchange membrane (PEM) systems. Despite extensive progress made catalyst development for hydrogen production through electrolysis last century, significant advancements have been accomplished. quest OER catalysts that possess both high activity and stability, while also being affordable, continues be challenging. Currently, Ru/Ir-based electrocatalysts are only practical anode available. Therefore, it is crucial explore feasible strategies enhance performance longevity catalysts. This review comprehensive assessment obstacles prospective Additionally, underscores areas research concentration, providing valuable perspectives future endeavors development.

Language: Английский

Citations

66
Metal Alloys‐Structured Electrocatalysts: Metal–Metal Interactions, Coordination Microenvironments, and Structural Property–Reactivity Relationships DOI
Chengdong Yang, Yun Gao, Tian Ma

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(51)

Published: April 24, 2023

Metal alloys-structured electrocatalysts (MAECs) have made essential contributions to accelerating the practical applications of electrocatalytic devices in renewable energy systems. However, due complex atomic structures, varied electronic states, and abundant supports, precisely decoding metal-metal interactions structure-activity relationships MAECs still confronts great challenges, which is critical direct future engineering optimization MAECs. Here, this timely review comprehensively summarizes latest advances creating MAECs, including interactions, coordination microenvironments, relationships. First, fundamental classification, design, characterization, structural reconstruction are outlined. Then, merits modulation strategies recent breakthroughs for noble non-noble metal-structured thoroughly discussed, such as solid solution alloys, intermetallic single-atom alloys. Particularly, unique insights into bond theoretical understanding, operando techniques mechanism disclosure given. Thereafter, current states diverse with a focus on property-reactivity relationships, reaction pathways, performance comparisons discussed. Finally, challenges perspectives systematically It believed that comprehensive can offer substantial impact stimulating widespread utilization metal materials electrocatalysis.

Language: Английский

Citations

65
Atomically dispersed Cu coordinated Rh metallene arrays for simultaneously electrochemical aniline synthesis and biomass upgrading DOI Creative Commons

Qiqi Mao,

Mu Xu,

Wenxin Wang

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Sept. 14, 2023

Organic electrocatalytic conversion is an essential pathway for the green of low-cost organic compounds to high-value chemicals, which urgently demands development efficient electrocatalysts. Here, we report a Cu single-atom dispersed Rh metallene arrays on foam cathodic nitrobenzene electroreduction reaction and anodic methanol oxidation reaction. In coupled system, Cusingle-atom-Rh requires only low voltages 1.18 V reach current densities 100 mA cm-2 generating aniline formate, with up ~100% conversion/ selectivity over ~90% formate Faraday efficiency, achieving synthesis chemicals. Density functional theory calculations reveal electron effect between host catalytic mechanism. The synergistic H*-spillover can improve process reduce energy barrier process, thus enhancing activity target product selectivity.

Language: Английский

Citations

61
Emerging Atomically Precise Metal Nanoclusters and Ultrasmall Nanoparticles for Efficient Electrochemical Energy Catalysis: Synthesis Strategies and Surface/Interface Engineering DOI
Mingjie Wu, Fang Dong, Yingkui Yang

et al.

Electrochemical Energy Reviews, Journal Year: 2024, Volume and Issue: 7(1)

Published: March 9, 2024

Language: Английский

Citations

51
Atomic Aerogel Materials (or Single‐Atom Aerogels): An Interesting New Paradigm in Materials Science and Catalysis Science DOI
Zesheng Li, Bolin Li, Changlin Yu

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(24)

Published: Jan. 6, 2023

The concept of "single-atom catalysis" is first proposed by Tao Zhang, Jun Li, and Jingyue Liu in 2011. Single-atom catalysts (SACs) have a very high catalytic activity greatly improved atom utilization ratio. At present, SACs become frontier materials the field catalysis. Aerogels are highly porous with extremely low density porosity. These pores play key role determining their surface reactivity mechanical stability. alliance aerogels can fully reflect structural advantages lead to new enhancement effects. Herein, general "atomic aerogel materials" (AAMs) (or single-atom (SAAs)) describe this interesting paradigm both material catalysis fields. Based on basic units "gel," AAMs be divided into two categories: carrier-level (with micro-, nano-, or sub-nanometer pore structures) atomic-level atomic-defective oxygen-bridged sub-nanopore structures). unit former (i.e., single-atom-functionalized aerogels) carrier nanostructures, latter single-atom-built single metal atoms atomic structures. will important development directions versatile heterogeneous noncatalytic design proposals, latent challenges, coping strategies nanosystem" applications pointed out as well.

Language: Английский

Citations

50
Regulating the Coordination Geometry and Oxidation State of Single‐Atom Fe Sites for Enhanced Oxygen Reduction Electrocatalysis DOI Creative Commons
Minjie Wang, Li Wang, Qing-Bin Li

et al.

Small, Journal Year: 2023, Volume and Issue: 19(24)

Published: March 15, 2023

Abstract FeNC catalysts demonstrate remarkable activity and stability for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells Zn–air batteries (ZABs). The local coordination of Fe single atoms strongly impacts ORR activity. Herein, containing sites with FeN 3 , 4 5 coordinations are synthesized by carbonization Fe‐rich polypyrrole precursors. possess a higher oxidation state (+2.62) than (+2.23) (+2.47) sites, Density functional theory calculations verify that optimizes adsorption desorption intermediates, dramatically lowering energy barrier OH − rate‐limiting step. A primary ZAB constructed using catalyst demonstrates state‐of‐the‐art performance (an open circuit potential 1.629 V, power density 159 mW cm −2 ). Results confirm an intimate structure‐activity relationship between coordination, state, catalysts.

Language: Английский

Citations

50
Dealloyed NiTiZrAg as an efficient electrocatalyst for hydrogen evolution in alkaline seawater DOI

Junyang Ding,

Hui Yang, Hao Zhang

et al.

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 53, P. 318 - 324

Published: Dec. 9, 2023

Language: Английский

Citations

43
Nanostructure engineering of ruthenium-modified electrocatalysts for efficient electrocatalytic water splitting DOI
Yun Tong, Pengzuo Chen

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(7), P. 3844 - 3878

Published: Jan. 1, 2024

This review provides a systematic summary of the nanostructure engineering Ru-modified electrocatalysts for electrocatalytic water splitting. These regulation strategies, such as single atom sites, doping, alloying and interfacial are summarized in detail.

Language: Английский

Citations

33