journal article·2024-11-08

Trace Rh Activates Surface Ni with Increased Local Charge for Efficient pH-Universal Hydrogen Generation

Minmin Cai, Qian Zhu, Xiangyan Hou, Lu Yao, Yuan Zhang, Xiaofeng Wu, Xiangdong Yao, Hao Chen, Yi Jia, Shouhua Feng, Keke Huang

ACS Energy Letters· Volume 9· Issue 11
Publisher page

Abstract

The unbefitting binding energy for H*/OH* with Ni sites greatly restrains the electrochemical activity of Ni for the hydrogen evolution reaction (HER). Herein, Ni nanograins incorporated with trace Rh (denoted as 3D RhNi) are synthesized through combining a facile ion-absorption and subsequent thermal reduction treatment, in which Rh increases the local charge density of Ni sites, dramatically accelerating the electrochemical kinetics of HER. Experimentally, the Rh–Ni catalyst with only 0.1 at. % Rh element exhibits superior HER activity among the reported Ni-based materials, whose overpotential is only 37 mV and 18 mV at 10 mA/cm 2 in 1.0 M KOH and 0.5 M H 2 SO 4, respectively. DFT calculations further identify that the resultant catalyst possesses appropriate intermediate binding energy in both acidic and alkaline conditions toward HER. This study provides a strategy to manipulate the local electronic structure for significantly improving the activity in surface catalysis.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Hydrogen Storage and Materials · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Inorganic Synthesis and Preparative Institution Chemistry, Jilin Provincial International Co-operation Key Laboratory of Advanced Inorganic Solid Functional Materials, College of Chemistry

Jilin University

Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences

School of Advanced Energy and IGCME

Sun Yat-sen University

Petroleum and Chemical Industry Key Laboratory of Organic Electrochemical Synthesis, College of Chemical Engineering

Zhejiang University of Technology

Zhejiang Carbon Neutral Innovation Institute & Zhejiang International Cooperation Base for Science and Technology on Carbon Emission Reduction and Monitoring

Moganshan Institute, Zhejiang University of Technology

Funding

National Key Research and Development Program of China · Jilin Provincial Scientific and Technological Development Program · National Natural Science Foundation of China

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