Volume 20, Issue 26 2311178
Research Article

Platinum–Ruthenium Dual-Atomic Sites Dispersed in Nanoporous Ni0.85Se Enabling Ampere-Level Current Density Hydrogen Production

Lebin Cai

Lebin Cai

College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082 China

Search for more papers by this author
Haoyun Bai

Haoyun Bai

Institute of Applied Physics and Materials Engineering, University of Macau, Macao S. A. R., 999078 China

Search for more papers by this author
Cheng-wei Kao

Cheng-wei Kao

National Synchrotron Radiation Research Center, Hsinchu, 30076 Taiwan

Search for more papers by this author
Kang Jiang

Kang Jiang

College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082 China

Search for more papers by this author
Hui Pan

Hui Pan

Institute of Applied Physics and Materials Engineering, University of Macau, Macao S. A. R., 999078 China

Search for more papers by this author
Ying-Rui Lu

Corresponding Author

Ying-Rui Lu

National Synchrotron Radiation Research Center, Hsinchu, 30076 Taiwan

E-mail: [email protected]; [email protected]

Search for more papers by this author
Yongwen Tan

Corresponding Author

Yongwen Tan

College of Materials Science and Engineering, Hunan University, Changsha, Hunan, 410082 China

E-mail: [email protected]; [email protected]

Search for more papers by this author
First published: 15 January 2024
Citations: 17

Abstract

Alkaline anion-exchange-membrane water electrolyzers (AEMWEs) using earth-abundant catalysts is a promising approach for the generation of green H2. However, the AEMWEs with alkaline electrolytes suffer from poor performance at high current density compared to proton exchange membrane electrolyzers. Here, atomically dispersed Pt-Ru dual sites co-embedded in nanoporous nickel selenides (np/Pt1Ru1-Ni0.85Se) are developed by a rapid melt-quenching approach to achieve highly-efficient alkaline hydrogen evolution reaction. The np/Pt1Ru1-Ni0.85Se catalyst shows ampere-level current density with a low overpotential (46 mV at 10 mA cm−2 and 225 mV at 1000 mA cm−2), low Tafel slope (32.4 mV dec−1), and excellent long-term durability, significantly outperforming the benchmark Pt/C catalyst and other advanced large-current catalysts. The remarkable HER performance of nanoporous Pt1Ru1-Ni0.85Se is attributed to the strong intracrystal electronic metal-support interaction (IEMSI) between Pt-Se-Ru sites and Ni0.85Se support which can greatly enlarge the charge redistribution density, reduce the energy barrier of water dissociation, and optimize the potential determining step. Furthermore, the assembled alkaline AEMWE with an ultralow Pt and Ru loading realizes an industrial-level current density of 1 A cm−2 at 1.84 volts with high durability.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.