High-efficiency electrocatalytic hydrogen generation under harsh acidic condition by commercially viable Pt nanocluster-decorated non-polar faceted GaN nanowires

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL International Journal of Hydrogen Energy Pub Date : 2024-11-17 DOI:10.1016/j.ijhydene.2024.11.174

Ameer Abdullah , Fawad Tariq , Mandar A. Kulkarni , Hamza Thaalbi , Haseeb Ud Din , Soon Hyung Kang , Sang-Wan Ryu

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Abstract

Electrochemical water splitting is vital for green hydrogen production and clean energy. This study introduces a novel approach: platinum nanoclusters (Pt NCs) decorated GaN nanowires (GNWs) on p++-Si substrates to enhance hydrogen generation efficiency. Highly-crystalline GNWs synthesized via commercial metal-organic chemical vapor deposition provide a scalable platform for hydrogen evolution. To address the cost limitations of Pt-based electrocatalysts, we developed a method for loading ultralow Pt NCs via photoelectrochemical deposition. Investigations underscore the Pt–Ga sites' crucial role in promoting efficient H₂ production. The Pt NCs/GNWs/p++-Si electrode achieved −10 mA/cm² current density at +50 mV vs. the RHE and sustained −20 mA/cm² for 90 h under harsh acidic conditions at room temperature and atmospheric pressure with nearly 100% retention. This study offers insights into efficient and stable electrodes for electrochemical H₂ generation.

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商业上可行的铂纳米簇装饰非极性刻面氮化镓纳米线在苛刻酸性条件下高效电催化制氢

电化学水分离对绿色制氢和清洁能源至关重要。本研究介绍了一种新方法：在 p++-Si 基底上用铂纳米簇（Pt NCs）装饰氮化镓纳米线（GNWs），以提高制氢效率。通过商业金属有机化学气相沉积合成的高结晶 GNW 为氢气进化提供了一个可扩展的平台。为了解决基于铂的电催化剂的成本限制，我们开发了一种通过光电化学沉积负载超低铂NC的方法。研究强调了 Pt-Ga 位点在促进高效制氢方面的关键作用。铂NCs/GNWs/p++-Si电极在+50 mV电压下与RHE相比达到了-10 mA/cm2的电流密度，并在室温和大气压下的苛刻酸性条件下维持-20 mA/cm2达90小时，保留率接近100%。这项研究为高效、稳定的电化学 H2 生成电极提供了启示。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.