Surface‐Enriched Single‐Bi‐Atoms Tailoring of Pt Nanorings for Direct Methanol Fuel Cells with Ultralow‐Pt‐Loading DOI
Xiaokun Fan, Wen Chen, Lei Xie

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 14, 2024

Abstract Single‐atom decorating of Pt emerges as a highly effective strategy to boost catalytic properties, which can trigger the most active sites while blocking smallest number atoms. However, rational design and creation high‐density single‐atoms on surface remain huge challenge. Herein, customized synthesis surface‐enriched single‐Bi‐atoms tailored nanorings ( SE‐Bi 1 /Pt NRs ) toward methanol oxidation is reported, guided by density functional theory (DFT) calculations suggesting that relatively higher Bi species ensure CO‐free pathway accelerate kinetics *HCOOH formation. Decorating with dense achieved starting from PtBi intermetallic nanoplates (NPs) intrinsically isolated atoms subsequent etching annealing treatments. The exhibit mass activity 23.77 A mg −1 in alkaline electrolyte, 2.2 12.8 times than those Pt‐Bi Pt/C, respectively. This excellent endows high likelihood be used practical anodic electrocatalyst for direct fuel cells （DMFCs） power 85.3 mW cm −2 ultralow loading 0.39 .

Язык: Английский

Toward Electrocatalytic Methanol Oxidation Reaction: Longstanding Debates and Emerging Catalysts DOI Open Access
Jianmei Wang, Bingxing Zhang, Wei Guo

и другие.

Advanced Materials, Год журнала: 2023, Номер 35(26)

Опубликована: Янв. 27, 2023

The study of direct methanol fuel cells (DMFCs) has lasted around 70 years, since the first investigation in early 1950s. Though enormous effort been devoted this field, it is still far from commercialization. oxidation reaction (MOR), as a semi-reaction DMFCs, bottleneck that restricts overall performance DMFCs. To date, there intense debate on complex six-electron reaction, but barely any reviews have systematically discussed topic. end, controversies and progress regarding electrocatalytic mechanisms, evaluations well design science toward MOR electrocatalysts are summarized. This review also provides comprehensive introduction recent development emerging with focus innovation alloy, core-shell structure, heterostructure, single-atom catalysts. Finally, perspectives future outlook mechanisms provided.

Язык: Английский

Процитировано

179
High-entropy alloys in electrocatalysis: from fundamentals to applications DOI
Jin‐Tao Ren, Lei Chen, Haoyu Wang

и другие.

Chemical Society Reviews, Год журнала: 2023, Номер 52(23), С. 8319 - 8373

Опубликована: Янв. 1, 2023

In this review, we provide a comprehensive summary of recent advances in the synthesis strategies, design principles, and characterization technologies high entropy alloys, their applications various electrocatalytic conversion reactions.

Язык: Английский

Процитировано

174
Review on Electrocatalytic Coreduction of Carbon Dioxide and Nitrogenous Species for Urea Synthesis DOI
Minghang Jiang, Mengfei Zhu, Mengjun Wang

и другие.

ACS Nano, Год журнала: 2023, Номер 17(4), С. 3209 - 3224

Опубликована: Фев. 14, 2023

The electrochemical coreduction of carbon dioxide (CO2) and nitrogenous species (such as NO3–, NO2–, N2, NO) for urea synthesis under ambient conditions provides a promising solution to realize carbon/nitrogen neutrality mitigate environmental pollution. Although an increasing number studies have made some breakthroughs in synthesis, the unsatisfactory Faradaic efficiency, low yield rate, ambiguous C–N coupling reaction mechanisms remain major obstacles its large-scale applications. In this review, we present recent progress on based CO2 aqueous solutions conditions, providing useful guidance discussion rational design metal nanocatalyst, understanding mechanism, existing challenges prospects synthesis. We hope that review can stimulate more insights inspiration toward development electrocatalytic technology.

Язык: Английский

Процитировано

154
High‐Entropy Alloy Aerogels: A New Platform for Carbon Dioxide Reduction DOI
Hanjun Li,

Honggang Huang,

Yao Chen

и другие.

Advanced Materials, Год журнала: 2022, Номер 35(2)

Опубликована: Ноя. 14, 2022

High-entropy alloy aerogels (HEAAs) combined with the advantages of high-entropy alloys and are prospective new platforms in catalytic reactions. However, due to differences reduction potentials miscibility behavior different metals, realization HEAAs a single phase is still great challenge. Herein, series fabricated via freeze-thaw method as highly active durable electrocatalysts for carbon dioxide reaction (CO2 RR). Especially, PdCuAuAgBiIn can achieve Faradaic efficiency (FE) C1 products almost 100% from -0.7 -1.1 V versus reversible hydrogen electrode (VRHE ), maximum FE formic acid (FEHCOOH ) 98.1% at VRHE , outperforming particles (HEAPs) Pd metallic (MAs). Specifically, current density FEHCOOH 200 mA cm-2 87% flow cell. The impressive CO2 RR performance attributed strong interactions between metals surface unsaturated sites, which regulate electronic structures allow optimal HCOO* intermediate adsorption desorption onto catalysts enhance HCOOH production. work not only provides facile synthetic strategy fabricate HEAAs, but also opens avenue development efficient beyond.

Язык: Английский

Процитировано

141
Intermetallic Nanocrystals for Fuel-Cells-Based Electrocatalysis DOI

Fangxu Lin,

Menggang Li, Lingyou Zeng

и другие.

Chemical Reviews, Год журнала: 2023, Номер 123(22), С. 12507 - 12593

Опубликована: Ноя. 1, 2023

Electrocatalysis underpins the renewable electrochemical conversions for sustainability, which further replies on metallic nanocrystals as vital electrocatalysts. Intermetallic have been known to show distinct properties compared their disordered counterparts, and long explored functional improvements. Tremendous progresses made in past few years, with notable trend of more precise engineering down an atomic level investigation transferring into practical membrane electrode assembly (MEA), motivates this timely review. After addressing basic thermodynamic kinetic fundamentals, we discuss classic latest synthetic strategies that enable not only formation intermetallic phase but also rational control other catalysis-determinant structural parameters, such size morphology. We demonstrate emerging nanomaterials potentially advancement energy electrocatalysis. Then, state-of-the-art characterizations representative electrocatalysts emphasis oxygen reduction reaction evaluated a MEA setup. summarize review by laying out existing challenges offering perspective future research directions toward practicing conversions.

Язык: Английский

Процитировано

102
Single-atom Mo-tailored high-entropy-alloy ultrathin nanosheets with intrinsic tensile strain enhance electrocatalysis DOI Creative Commons
Lin He, Menggang Li,

Longyu Qiu

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 13, 2024

Abstract The precise structural integration of single-atom and high-entropy-alloy features for energy electrocatalysis is highly appealing conversion, yet remains a grand challenge. Herein, we report class Mo-tailored PdPtNiCuZn nanosheets with dilute Pt-Pt ensembles intrinsic tensile strain (Mo 1 -PdPtNiCuZn) as efficient electrocatalysts enhancing the methanol oxidation reaction catalysis. as-made Mo -PdPtNiCuZn delivers an extraordinary mass activity 24.55 A mg Pt −1 11.62 Pd+Pt , along impressive long-term durability. planted oxophilic single atoms promoters modify electronic structure isolated sites in host, suppressing formation CO adsorbates steering towards formate pathway. Meanwhile, synergistically optimize adsorption behaviour intermediates to achieve more energetically favourable pathway minimize barrier. This work advances design atomically catalytic by creating new paradigm atom-tailored high-entropy alloys, opening encouraging CO-tolerance electrocatalysts.

Язык: Английский

Процитировано

80
Coordination engineering in single-site catalysts: General principles, characterizations, and recent advances DOI Creative Commons
Haozhu Wang, Tao Yang, Jingyang Wang

и другие.

Chem, Год журнала: 2023, Номер 10(1), С. 48 - 85

Опубликована: Сен. 21, 2023

Язык: Английский

Процитировано

77
Optimization strategies of high-entropy alloys for electrocatalytic applications DOI Creative Commons
Liyuan Xiao, Zhenlü Wang, Jingqi Guan

и другие.

Chemical Science, Год журнала: 2023, Номер 14(45), С. 12850 - 12868

Опубликована: Янв. 1, 2023

This review summarizes the synthesis methods, characterization research progress and regulation strategies of HAEs in field electrocatalytic HER, HOR, OER, ORR, CO 2 RR, NRR AOR, providing deep understanding for future applications.

Язык: Английский

Процитировано

77
Metal Alloys‐Structured Electrocatalysts: Metal–Metal Interactions, Coordination Microenvironments, and Structural Property–Reactivity Relationships DOI
Chengdong Yang, Yun Gao, Tian Ma

и другие.

Advanced Materials, Год журнала: 2023, Номер 35(51)

Опубликована: Апрель 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.

Язык: Английский

Процитировано

68
Synthesis of High‐Entropy‐Alloy Nanoparticles by a Step‐Alloying Strategy as a Superior Multifunctional Electrocatalyst DOI
Yang Wang,

Wenhui Luo,

Shen Gong

и другие.

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Май 8, 2023

High-entropy-alloy nanoparticles (HEA-NPs) have attracted great attention because of their unique complex compositions and tailorable properties. Further expanding the compositional space is significance for enriching material library. Here, a step-alloying strategy developed to synthesis HEA-NPs containing range strongly repellent elements (e.g., Bi-W) by using rich-Pt cores formed during first liquid phase reaction as seed second thermal diffusion. Remarkably, representative HEA-NPs-(14) with up 14 exhibits extremely excellent multifunctional electrocatalytic performance pH-universal hydrogen evolution (HER), alkaline methanol oxidation (MOR), oxygen reduction (ORR). Briefly, only requires ultralow overpotentials 11 18 mV deliver 10 mA cm-2 ultralong durability 400 264 h under 100 in 0.5 m H2 SO4 1 KOH, respectively, which surpasses most advanced HER catalysts. Moreover, also an impressive peak current density 12.6 A mg-1Pt KOH + MeOH half-wave potential 0.86 V (vs RHE.) 0.1 KOH. The work further expands spectrum possible metal alloys, important broad future data-driven discovery.

Язык: Английский

Процитировано

68