Outlook on Single Atom Catalysts for Persulfate-Based Advanced Oxidation DOI
Xuanhao Wu, Jae‐Hong Kim

ACS ES&T Engineering, Journal Year: 2022, Volume and Issue: 2(10), P. 1776 - 1796

Published: Sept. 7, 2022

Single atom catalysts (SACs) have emerged as a promising catalyst material architecture for energy, chemical, and environmental applications. In the past several years, SACs been increasingly explored persulfate-based advanced oxidation processes (AOPs) due to their superior persulfate activation pollutant degradation performance compared benchmark dissolved ion nanoparticle catalysts. However, there still exist uncertainties on mechanism of by SACs, which involves complex interplay sulfate hydroxyl radicals, singlet oxygen, high-valent metal species, and/or mediated electron transfer. Questions also remain how ions molecularly align single site, are converted into reactive what design parameters lead higher efficiency degradation. this critical review, we examine SAC materials employed AOPs discuss they function differently counterparts. We further our discussion current limitations, opportunities, future research needs in (i) filling knowledge gaps mechanisms persulfate-SAC interactions; (ii) augmenting fundamental with theoretical simulation situ characterization techniques; (iii) improving tailored applications; (iv) proactively considering challenges associated engineering practices water matrixes.

Language: Английский

Chemical Synthesis of Single Atomic Site Catalysts DOI

Shufang Ji,

Yuanjun Chen, Xiaolu Wang

et al.

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 11900 - 11955

Published: April 3, 2020

Manipulating metal atoms in a controllable way for the synthesis of materials with desired structure and properties is holy grail chemical synthesis. The recent emergence single atomic site catalysts (SASC) demonstrates that we are moving toward this goal. Owing to maximum efficiency atom-utilization unique structures properties, SASC have attracted extensive research attention interest. prerequisite scientific practical applications fabricate highly reactive stable on appropriate supports. In review, various synthetic strategies summarized concrete examples highlighting key issues methods stabilize supports suppress their migration agglomeration. Next, discuss how conditions affect catalytic before ending review by prospects challenges as well further researches SASC.

Language: Английский

Citations

1102
Single-Atom Catalysts across the Periodic Table DOI
Selina K. Kaiser, Zupeng Chen, Dario Faust Akl

et al.

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 11703 - 11809

Published: Oct. 21, 2020

Isolated atoms featuring unique reactivity are at the heart of enzymatic and homogeneous catalysts. In contrast, although concept has long existed, single-atom heterogeneous catalysts (SACs) have only recently gained prominence. Host materials similar functions to ligands in catalysts, determining stability, local environment, electronic properties isolated thus providing a platform for tailoring targeted applications. Within just decade, we witnessed many examples SACs both disrupting diverse fields catalysis with their distinctive substantially enriching our understanding molecular processes on surfaces. To date, term SAC mostly refers late transition metal-based systems, but numerous exist which other elements play key catalytic roles. This review provides compositional encyclopedia SACs, celebrating 10th anniversary introduction this term. By defining broadest sense, explore full elemental diversity, joining different areas across whole periodic table, discussing historical milestones recent developments. particular, examine coordination structures associated accessed through distinct single-atom–host combinations relate them main applications thermo-, electro-, photocatalysis, revealing trends element-specific evolution, host design, uses. Finally, highlight frontiers field, including multimetallic atom proximity control, possible multistep cascade reactions, identifying challenges, propose directions future development flourishing field.

Language: Английский

Citations

1012
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

770
Surface Coordination Chemistry of Atomically Dispersed Metal Catalysts DOI
Ruixuan Qin, Kunlong Liu, Qingyuan Wu

et al.

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 11810 - 11899

Published: Aug. 13, 2020

Atomically dispersed metal catalysts (ADCs), as an emerging class of heterogeneous catalysts, have been widely investigated during the past two decades. The atomic dispersion nature catalytic centers makes them ideal system for bridging homogeneous and catalysts. recent rapid development new synthetic strategies has led to explosive growth ADCs with a wide spectrum atoms on supports different chemical compositions natures. availability diverse creates powerful materials platform investigating mechanisms complicated catalysis at levels. Considering most are coordinated by donors from supports, this review will demonstrate how surface coordination chemistry plays important role in determining performance ADCs. This start link between catalysis. After brief description advantages limitations common structure characterization methods ADCs, types be discussed. We mainly illustrate local vicinal species support systems act together center determine activity, selectivity, stability dynamic change highlighted. At end review, personal perspectives further field provided.

Language: Английский

Citations

452
Pt/Fe2O3 with Pt–Fe pair sites as a catalyst for oxygen reduction with ultralow Pt loading DOI
Ruijie Gao, Jian Wang, Zhen‐Feng Huang

et al.

Nature Energy, Journal Year: 2021, Volume and Issue: 6(6), P. 614 - 623

Published: May 20, 2021

Language: Английский

Citations

391
Recent Advances in MOF‐Derived Single Atom Catalysts for Electrochemical Applications DOI
Zhongxin Song, Lei Zhang, Kieran Doyle‐Davis

et al.

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(38)

Published: Aug. 13, 2020

Abstract Electrocatalysis plays a critical role in clean energy conversion, enabling great improvement for future sustainable technologies. Single atom catalysts (SACs) derived from metal–organic framework (MOF) are emerging extraordinary materials electrochemical catalytic applications. Covering the merits of unique electronic structure, low‐coordination environment, quantum size effect, and metal–support interaction, SACs promise enhanced electrocatalytic activity, stability, selectivity field conversion. In this article, MOF synthesis routes to afford well‐dispersed along with respective mechanism systematically reviewed first, typical examples each strategy carefully discussed. Then characterization techniques understanding isolated spatial distribution, local coordination environment SACs, insights into stable mechanisms provided by density functional theory (DFT) calculations summarized. addition, several important applications MOF‐derived including oxygen reduction reaction, CO 2 nitrogen hydrogen evolution etc., highlighted. To facilitate development high‐performing technical challenges corresponding research directions proposed.

Language: Английский

Citations

339
Regulations of active moiety in single atom catalysts for electrochemical hydrogen evolution reaction DOI Open Access
Peng Zhu, Xiang Xiong, Dingsheng Wang

et al.

Nano Research, Journal Year: 2022, Volume and Issue: 15(7), P. 5792 - 5815

Published: May 4, 2022

Language: Английский

Citations

314
Electrochemical Water Splitting: Bridging the Gaps Between Fundamental Research and Industrial Applications DOI Open Access
Hainan Sun, Xiaomin Xu, Hyunseung Kim

et al.

Energy & environment materials, Journal Year: 2022, Volume and Issue: 6(5)

Published: May 28, 2022

Electrochemical water splitting represents one of the most promising technologies to produce green hydrogen, which can help realize goal achieving carbon neutrality. While substantial efforts on a laboratory scale have been made for understanding fundamental catalysis and developing high‐performance electrocatalysts two half‐reactions involved in electrocatalysis, much less attention has paid doing relevant research larger scale. For example, few such researches done an industrial Herein, we review very recent endeavors bridge gaps between applications electrolysis. We begin by introducing fundamentals electrochemical then present comparisons testing protocol, figure merit, catalyst interest, manufacturing cost industry‐based water‐electrolysis research. Special is tracking surface reconstruction process identifying real catalytic species under different conditions, highlight significant distinctions corresponding mechanisms. Advances designs industry‐relevant electrolysis are also summarized, reveal progress moving practical forward accelerating synergies material science engineering. Perspectives challenges electrocatalyst design strategies proposed finally further lab‐scale large‐scale electrocatalysis applications.

Language: Английский

Citations

313
Non-carbon-supported single-atom site catalysts for electrocatalysis DOI
Xiaobo Zheng, Peng Li, Shi Xue Dou

et al.

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(5), P. 2809 - 2858

Published: Jan. 1, 2021

Non-carbon supported SACs were classified into eight categories based on the nature of their substrates for first time, and corresponding anchoring stabilization mechanisms have been systematically summarized discussed.

Language: Английский

Citations

271
Establishing reactivity descriptors for platinum group metal (PGM)-free Fe–N–C catalysts for PEM fuel cells DOI Creative Commons
Mathias Primbs, Yanyan Sun, Aaron Roy

et al.

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 13(8), P. 2480 - 2500

Published: Jan. 1, 2020

Establishing new reactivity map descriptor of TOF–SD for PGM-free Fe–N–C catalysts ORR activity.

Language: Английский

Citations

267