Elemental Charge Engineering in Cobalt and Cobalt–Phosphide Interface for Enhanced Oxygen Evolution and Urea Oxidation Reactions,ACS Applied Energy Materials

当前位置： X-MOL 学术 › ACS Appl. Energy Mater. › 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.)

Elemental Charge Engineering in Cobalt and Cobalt–Phosphide Interface for Enhanced Oxygen Evolution and Urea Oxidation Reactions
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2024-04-16 , DOI: 10.1021/acsaem.4c00694
Xiang Ding ₁ , Jun Xiang ₁ , Yangyang Wan ₂ , Fuzhan Song ₂

Affiliation

The development of cost-effective electrocatalysts with high performance for oxygen evolution and urea oxidation reaction (OER/UOR) is desirable but remains a great challenge. Here, we report a facile strategy for boron-doping cobalt and cobalt–phosphide interfacial electrocatalysts (B–Co/Co₂P) for bifunctional OER/UOR. By virtue of B doping, the abundant exposed active sites as well as enhanced electrical conductivity can efficiently improve charge migration of the heterogeneous interfacial sites. Therefore, the obtained B–Co/Co₂P electrocatalysts exhibit bifunctional OER/UOR activities with an outstanding overpotential of 284 and 107 mV at an industrial current density of 100 mA cm^–2, respectively. Such an excellent catalytic performance is attributed to the fact that the B dopant adjusts the electron distribution of interfacial catalytic sites and optimizes the adsorption/desorption of reaction intermediate species, as well as reduces the energy barriers of water oxidation. Furthermore, the setup two-electrode cell requires merely overpotentials of 280.7 and 56.9 mV to drive 10 mA cm^–2 with robust stability in water splitting and urea electrolysis, respectively. Overall, this report provides a strategy to construct bifunctional OER/UOR catalysts with high efficiency for hydrogen generation.

中文翻译：

钴和钴磷化物界面的元素电荷工程，用于增强析氧和尿素氧化反应

开发具有高性能的、具有成本效益的析氧和尿素氧化反应（OER/UOR）电催化剂是可取的，但仍然是一个巨大的挑战。在这里，我们报告了一种用于双功能 OER/UOR 的硼掺杂钴和钴-磷化物界面电催化剂 (B-Co/Co ₂ P) 的简便策略。借助B掺杂，丰富的暴露活性位点以及增强的电导率可以有效地改善异质界面位点的电荷迁移。因此，所获得的B-Co/Co _{2 P电催化剂表现出双功能OER/UOR活性，在100 mA cm}^–2的工业电流密度下分别具有284和107 mV的出色过电势。如此优异的催化性能归因于B掺杂剂调节界面催化位点的电子分布，优化反应中间体的吸附/解吸，并降低水氧化的能垒。此外，所设置的两电极电池仅需要 280.7 和 56.9 mV 的过电势即可分别驱动 10 mA cm ^–2，在水分解和尿素电解方面具有强大的稳定性。总体而言，本报告提供了构建高效产氢双功能 OER/UOR 催化剂的策略。

更新日期：2024-04-16

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