Ruthenium Nanoclusters and Single Atoms on α‐MoC/N‐Doped Carbon Achieves Low‐Input/Input‐Free Hydrogen Evolution via Decoupled/Coupled Hydrazine Oxidation

Author:

Li Yapeng12,Niu Shuwen13,Liu Peigen2,Pan Rongrong12,Zhang Huaikun4,Ahmad Nazir4,Shi Yi2,Liang Xiao5,Cheng Mingyu4,Chen Shenghua5,Du Junyi6,Hu Maolin1,Wang Dingsheng5,Chen Wei1ORCID,Li Yadong5

Affiliation:

1. Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering Wenzhou University Wenzhou, Zhejiang 325035 P. R. China

2. Center of Advanced Nanocatalysis (CAN), Department of Applied Chemistry University of Science and Technology of China Hefei, Anhui 230026 P. R. China

3. College of Chemistry and Chemical Engineering Qingdao University Qingdao, Shangdong 266071 P. R. China

4. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering University of Science and Technology of China Hefei, Anhui 230026 P. R. China

5. Department of Chemistry Tsinghua University Beijing 100084 P. R. China

6. Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Division of Advanced Materials, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, Jiangsu 215123 P. R. China

Abstract

AbstractThe hydrazine oxidation‐assisted H2 evolution method promises low‐input and input‐free hydrogen production. However, developing high‐performance catalysts for hydrazine oxidation (HzOR) and hydrogen evolution (HER) is challenging. Here, we introduce a bifunctional electrocatalyst α‐MoC/N−C/RuNSA, merging ruthenium (Ru) nanoclusters (NCs) and single atoms (SA) into cubic α‐MoC nanoparticles‐decorated N‐doped carbon (α‐MoC/N−C) nanowires, through electrodeposition. The composite showcases exceptional activity for both HzOR and HER, requiring −80 mV and −9 mV respectively to reach 10 mA cm−2. Theoretical and experimental insights confirm the importance of two Ru species for bifunctionality: NCs enhance the conductivity, and its coexistence with SA balances the H ad/desorption for HER and facilitates the initial dehydrogenation during the HzOR. In the overall hydrazine splitting (OHzS) system, α‐MoC/N−C/RuNSA excels as both anode and cathode materials, achieving 10 mA cm−2 at just 64 mV. The zinc hydrazine (Zn−Hz) battery assembled with α‐MoC/N−C/RuNSA cathode and Zn foil anode can exhibit 97.3 % energy efficiency, as well as temporary separation of hydrogen gas during the discharge process. Therefore, integrating Zn−Hz with OHzS system enables self‐powered H2 evolution, even in hydrazine sewage. Overall, the amalgamation of NCs with SA achieves diverse catalytic activities for yielding multifold hydrogen gas through advanced cell‐integrated‐electrolyzer system.

Funder

China Postdoctoral Science Foundation

National Natural Science Foundation of China

Publisher

Wiley

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