Bimetallic Sulfur-Doped Nickel–Cobalt Selenides as Efficient Bifunctional Electrocatalysts for the Complete Decomposition of Water,Small

当前位置： X-MOL 学术 › Small › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Bimetallic Sulfur-Doped Nickel–Cobalt Selenides as Efficient Bifunctional Electrocatalysts for the Complete Decomposition of Water
Small ( IF 13.0 ) Pub Date : 2024-09-09 , DOI: 10.1002/smll.202402954
ZhongKe Luo _{1,

2} , Hao Yi _{1,

2} , ZiHan Yang _{1,

2} , Chao Wang _{1,

2}

Affiliation

The creation and enhancement of non-precious metal bifunctional catalysts with superior stability and stabilizing activity is necessary to achieve water splitting in alkaline media. The paper presents a method for preparing nickel–cobalt bimetallic selenides (NiCo-Se_x/CF) using a combination of hydrothermal and high-temperature selenization techniques. NiCo-Se_x/CF shows great potential as a catalyst for water separation. The catalyst's electronic structure and active centre can be modified by double doping with sulfur and selenium, resulting in increased selectivity and activity under varying reaction conditions. This method also offers the benefits of a simple preparation process and applicability to a wide range of catalytic reactions. Experimental results demonstrate that an overpotential of 194 mV produces a current density of 10 mA cm⁻² when using this electrocatalyst as an OER catalyst. When used as a HER catalyst, the electrocatalyst required an overpotential of only 76 mV to generate a current density of 10 mA cm⁻².Furthermore, a voltage of 1.5 V can drive the overall decomposition of water to achieve a current density of 10 mA cm⁻². This study highlights the potential of sulfur-selenide double-doped catalysts for both scientific research and practical applications.

中文翻译：

双金属硫掺杂镍钴硒化物作为高效双功能电催化剂，用于水的完全分解

创造和增强具有卓越稳定性和稳定活性的非贵金属双功能催化剂对于在碱性介质中实现水分解是必要的。本文提出了一种结合使用水热和高温硒化技术制备镍钴双金属硒化物（NiCo-Se_x/CF）的方法。NiCo-Se_x/CF 作为水分离催化剂显示出巨大的潜力。催化剂的电子结构和活性中心可以通过硫和硒的双重掺杂来改变，从而在不同的反应条件下提高选择性和活性。该方法还具有制备工艺简单和适用于各种催化反应的优点。实验结果表明，当使用该电催化剂作为 OER 催化剂时，194 mV 的过电位会产生 10 mA ^cm-2 的电流密度。当用作 HER 催化剂时，电催化剂只需要 76 mV 的过电位即可产生 10 mA ^cm-2 的电流密度。此外，1.5 V 的电压可以驱动水的整体分解，以达到 10 mA cm⁻² 的电流密度。本研究强调了硫-硒化物双掺杂催化剂在科学研究和实际应用中的潜力。

更新日期：2024-09-09

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南