DataVXAdvanced Energy MaterialsPaper
journal article·2025-04

Highly Open Phosphorized PtNi Nanohexapod/N‐doped Graphene Aerogel for High‐Performance Alkaline Hydrogen Evolution

Jing Yang, Jianlan Wang, René Hübner, Xingyu Tao, Yansong Ren, Zhikun Zheng, Wei Liu

Advanced Energy Materials· Volume 15· Issue 14
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Source abstract

Abstract

Abstract Developing cost‐effective, high‐efficiency, and stable electrocatalysts for the hydrogen evolution reaction (HER) in alkaline electrolytes is of critical importance for realizing renewable hydrogen technologies. However, the sluggish HER kinetics and unsatisfied stability remain critical challenges for their practical applications. Herein, a hierarchically porous phosphorized Pt‐Ni nanohexapod/N‐doped graphene aerogel (P‐PtNiNH/NGA) constructed by an oxidation‐phosphorization‐controlled reconfiguration strategy is presented. It enables fast water dissociation kinetics for an abundant supply of hydrogen ions, strong electron interaction for optimal intermediate adsorption, and an excellent anchoring effect of the NGA to avoid the aggregation and Ostwald ripening of the PtNiNHs, thus exhibiting superior activity and exceptional stability toward alkaline HER. The P‐Pt1Ni2NH/NGA exhibits an ultralow overpotential of 15 mV at a current density of 10 mA cm−2, a low Tafel slope of 37 mV dec−1, and long‐term stability, which are superior to commercial Pt/C. Moreover, the P‐Pt1Ni2NH/NGA shows a high mass activity of 13.4 mA µg−1 and a large TOF value of 13.5 s−1 at an overpotential of 100 mV, which are 8.8 times and 9.0 times higher than commercial Pt/C (under the same Pt loading of ≈9.1 µg cm−2). This work is of high inspiration for catalyst design to obtain ideal alkaline HER performance.
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Research context

Energy storageNanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

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

Affiliations

School of Materials Science and Engineering Sun Yat‐sen University Guangzhou 510275 P. R. China

National & Local Joint Engineering Laboratory for New Petro‐chemical Materials and Fine Utilization of Resources Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) College of Chemistry and Chemical Engineering Hunan Normal University Changsha 410081 P. R. China

The Key Laboratory of Low‐Carbon Chemistry & Energy Conservation of Guangdong Province Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat‐sen University Guangzhou 510275 P. R. China

Helmholtz‐Zentrum Dresden‐Rossendorf Institute of Ion Beam Physics and Materials Research Bautzner Landstrasse 400 01328 Dresden Germany

Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistry and State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat‐sen University Guangzhou 510275 P. R. China

School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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