Single‐atom catalysis for carbon neutrality DOI Creative Commons
Ligang Wang, Dingsheng Wang, Yadong Li

et al.

Carbon Energy, Journal Year: 2022, Volume and Issue: 4(6), P. 1021 - 1079

Published: July 14, 2022

Abstract Currently, more than 86% of global energy consumption is still mainly dependent on traditional fossil fuels, which causes resource scarcity and even emission high amounts carbon dioxide (CO 2 ), resulting in a severe “Greenhouse effect.” Considering this situation, the concept “carbon neutrality” has been put forward by 125 countries one after another. To achieve goals neutrality,” two main strategies to reduce CO emissions develop sustainable clean can be adopted. Notably, these are crucial for synthesis advanced single‐atom catalysts (SACs) energy‐related applications. In review, we highlight unique SACs conversion into high‐efficiency energy, example, through photocatalytic, electrocatalytic, thermal catalytic hydrogenation technologies, convert hydrocarbon fuels (CO, CH 4 , HCOOH, 3 OH, multicarbon [C 2+ ] products). addition, introduce technologies devices replace polluting such as photocatalytic electrocatalytic water splitting produce hydrogen oxygen reduction reaction (ORR) fuel cells. Impressively, several representative examples (including d ‐, ds p f ‐blocks) conversion, H ORR discussed describe methods, characterization, corresponding activity. Finally, review concludes with description challenges outlooks future applications contributing toward neutrality.

Language: Английский

Direct electrosynthesis of pure aqueous H 2 O 2 solutions up to 20% by weight using a solid electrolyte DOI
Chuan Xia, Xia Yang, Peng Zhu

et al.

Science, Journal Year: 2019, Volume and Issue: 366(6462), P. 226 - 231

Published: Oct. 11, 2019

Hydrogen peroxide (H2O2) synthesis generally requires substantial postreaction purification. Here, we report a direct electrosynthesis strategy that delivers separate hydrogen (H2) and oxygen (O2) streams to an anode cathode separated by porous solid electrolyte, wherein the electrochemically generated H+ HO2- recombine form pure aqueous H2O2 solutions. By optimizing functionalized carbon black catalyst for two-electron reduction, achieved >90% selectivity at current densities up 200 milliamperes per square centimeter, which represents productivity of 3.4 millimoles centimeter hour (3660 moles kilogram hour). A wide range concentrations solutions 20 weight % could be obtained tuning water flow rate through retained activity 100 hours.

Language: Английский

Citations

821
Advanced Electrocatalysts with Single-Metal-Atom Active Sites DOI
Yuxuan Wang, Hongyang Su, Yanghua He

et al.

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 12217 - 12314

Published: Nov. 2, 2020

Electrocatalysts with single metal atoms as active sites have received increasing attention owing to their high atomic utilization efficiency and exotic catalytic activity selectivity. This review aims provide a comprehensive summary on the recent development of such single-atom electrocatalysts (SAECs) for various energy-conversion reactions. The discussion starts an introduction different types SAECs, followed by overview synthetic methodologies control dispersion atomically resolved characterization using state-of-the-art microscopic spectroscopic techniques. In recognition extensive applications electrocatalytic studies are dissected in terms important electrochemical reactions, including hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO2RR), nitrogen (NRR). Examples SAECs deliberated each case performance, structure-property relationships, enhancement mechanisms. A perspective is provided at end section about remaining challenges opportunities targeted reaction.

Language: Английский

Citations

787
Atomic site electrocatalysts for water splitting, oxygen reduction and selective oxidation DOI
Di Zhao, Zewen Zhuang, Xing Cao

et al.

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(7), P. 2215 - 2264

Published: Jan. 1, 2020

This review summarized the fabrication routes and characterization methods of atomic site electrocatalysts (ASCs) followed by their applications for water splitting, oxygen reduction selective oxidation.

Language: Английский

Citations

724
Ultrafast room-temperature synthesis of porous S-doped Ni/Fe (oxy)hydroxide electrodes for oxygen evolution catalysis in seawater splitting DOI
Luo Yu, Libo Wu, Brian McElhenny

et al.

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 13(10), P. 3439 - 3446

Published: Jan. 1, 2020

A robust oxygen-evolving electrocatalyst for high-performance seawater splitting was developed using a cost-effective and industrially compatible method.

Language: Английский

Citations

707
2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis DOI Creative Commons
Qiang Fu, Jiecai Han, Xianjie Wang

et al.

Advanced Materials, Journal Year: 2020, Volume and Issue: 33(6)

Published: June 24, 2020

Hydrogen has been deemed as an ideal substitute fuel to fossil energy because of its renewability and the highest density among all chemical fuels. One most economical, ecofriendly, high-performance ways hydrogen production is electrochemical water splitting. Recently, 2D transition metal dichalcogenides (also known TMDs) showed their utilization potentiality cost-effective evolution reaction (HER) catalysts in electrolysis. Herein, recent representative research efforts systematic progress made TMDs are reviewed, future opportunities challenges discussed. Furthermore, general methods synthesizing materials introduced detail advantages disadvantages for some specific provided. This explanation includes several important regulation strategies creating more active sites, heteroatoms doping, phase engineering, construction heterostructures, synergistic modulation which capable optimizing electrical conductivity, exposure catalytic barrier electrode material boost HER kinetics. In last section, current obstacles chances development electrocatalysts proposed provide insight into valuable guidelines fabricating effective electrocatalysts.

Language: Английский

Citations

538
Electrocatalytic Refinery for Sustainable Production of Fuels and Chemicals DOI Creative Commons
Cheng Tang, Yao Zheng, Mietek Jaroniec

et al.

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(36), P. 19572 - 19590

Published: Feb. 19, 2021

Abstract Compared to modern fossil‐fuel‐based refineries, the emerging electrocatalytic refinery (e‐refinery) is a more sustainable and environmentally benign strategy convert renewable feedstocks energy sources into transportable fuels value‐added chemicals. A crucial step in conducting e‐refinery processes development of appropriate reactions optimal electrocatalysts for efficient cleavage formation chemical bonds. However, compared well‐studied primary (e.g., O 2 reduction, water splitting), mechanistic aspects materials design complex are yet be settled. To address this challenge, herein, we first present fundamentals heterogeneous electrocatalysis some reactions, then implement these establish framework by coupling situ generated intermediates (integrated reactions) or products (tandem reactions). We also set principles strategies efficiently manipulate reaction pathways.

Language: Английский

Citations

530
Recent Advances in Electrocatalysts for Proton Exchange Membrane Fuel Cells and Alkaline Membrane Fuel Cells DOI
Fei Xiao, Yucheng Wang, Zhi‐Peng Wu

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(50)

Published: March 21, 2021

Abstract The rapid progress of proton exchange membrane fuel cells (PEMFCs) and alkaline (AMFCs) has boosted the hydrogen economy concept via diverse energy applications in past decades. For a holistic understanding development status PEMFCs AMFCs, recent advancements electrocatalyst design catalyst layer optimization, along with cell performance terms activity durability are summarized here. activity, stability, different types electrocatalysts for both oxygen reduction reaction oxidation discussed compared. Research directions on further active, stable, low‐cost to meet ultimate commercialization AMFCs also discussed.

Language: Английский

Citations

471
Electrochemical CO2 reduction to high-concentration pure formic acid solutions in an all-solid-state reactor DOI Creative Commons
Lei Fan, Chuan Xia, Peng Zhu

et al.

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: July 20, 2020

Electrochemical CO2 reduction reaction (CO2RR) to liquid fuels is currently challenged by low product concentrations, as well their mixture with traditional electrolytes, such KHCO3 solution. Here we report an all-solid-state electrochemical CO2RR system for continuous generation of high-purity and high-concentration formic acid vapors solutions. The cathode anode were separated a porous solid electrolyte (PSE) layer, where electrochemically generated formate proton recombined form molecular acid. can be efficiently removed in the via inert gas stream flowing through PSE layer. Coupling high activity (formate partial current densities ~450 mA cm-2), selectivity (maximal Faradaic efficiency ~97%), stability (100 hours) grain boundary-enriched bismuth catalyst, demonstrated ultra-high concentrations pure solutions (up nearly 100 wt.%) condensed from flexible tuning carrier stream.

Language: Английский

Citations

446
Designing Atomic Active Centers for Hydrogen Evolution Electrocatalysts DOI
Yongpeng Lei, Yuchao Wang, Yi Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(47), P. 20794 - 20812

Published: Jan. 8, 2020

The evolution of hydrogen from water using renewable electrical energy is a topic current interest. Pt/C exhibits the highest catalytic activity for H2 reaction (HER), but scarce supplies and high cost limit its large-scale application. Atomic active centers in single-atom catalysts, alloys, catalysts with two atom sorts exhibit maximum atomic efficiency, unique structure, exceptional HER. Interactions between well-defined sites supports are known to affect electron transfer dramatically accelerate reaction. This Review first highlights methods studying Then, different coordination configurations described. Active one metal atom, atoms as well nonmetal analyzed at scale. Finally, future research perspectives proposed.

Language: Английский

Citations

346
Surface Composition Dependent Ligand Effect in Tuning the Activity of Nickel–Copper Bimetallic Electrocatalysts toward Hydrogen Evolution in Alkaline DOI
Chao Wei, Yuanmiao Sun, Günther G. Scherer

et al.

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(17), P. 7765 - 7775

Published: April 13, 2020

Exploring efficient and low-cost electrocatalysts for hydrogen evolution reaction (HER) in alkaline media is critical developing anion exchange membrane electrolyzers. The key to a rational catalyst design understanding the descriptors that govern HER activity. Unfortunately, principles performance remain unclear are still under debate. By studying at series of NiCu bimetallic surfaces, where electronic structure modulated by ligand effect, we demonstrate activity can be correlated with either calculated or experimental-measured d band center (an indicator binding energy) via volcano-type relationship. Such correlation indicates descriptor role center, this hypothesis further supported evidence combining Ni Cu produces variety adsorption sites, which possess near-optimal energy. Our finding broadens applicability theory prediction metal may offer an insightful mechanism.

Language: Английский

Citations

322