当前位置: X-MOL 学术Adv. 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.)
CeO2-Accelerated Surface Reconstruction of CoSe2 Nanoneedle Forms Active CeO2@CoOOH Interface to Boost Oxygen Evolution Reaction for Water Splitting
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-11-10 , DOI: 10.1002/aenm.202403744
Quanxin Guo, Yu Li, Zhengrong Xu, Rui Liu

Interface engineering is an efficient strategy to create high-performance electrocatalysts for water splitting. In the present work, CeO2@CoSe2 nanoneedle on carbon cloth (CeO2@CoSe2/CC) demonstrates high efficiency for oxygen evolution reaction (OER) and water splitting. CeO2 with abundant O vacancies facilitates the adsorption of OH and boosts the reconstruction of CoSe2 into CoOOH at lower potentials. The in situ generated active CeO2@CoOOH heterointerface upshifts the d-band center of Co site, thereby decreasing the free energy of rate-determining step (RDS) (*O to *OOH) during the OER process. It delivers a low OER overpotential of 245 mV at 10 mA cm−2. CeO2@CoSe2/CC is also found to be active for hydrogen evolution reaction (HER, 138 mV overpotential at 10 mA cm−2), profiting from CeO2-facilitated *H2O dissociation and *H adsorption on CoSe2. The overall water splitting is achieved over the CeO2@CoSe2/CC bifunctional electrode with a low electrolysis voltage of 1.54 V at 10 mA cm−2. This work offers valuable insights into CeO2-assisted surface reconstruction as well as provides water electrolysis catalysts through interface engineering.

中文翻译:


CeO2 加速 CoSe2 纳米针表面重构形成活性 CeO2@CoOOH 界面以促进析氧反应以实现水分解



界面工程是创建用于水分解的高性能电催化剂的有效策略。在本工作中,碳布上的 CeO2@CoSe2 纳米针 (CeO2@CoSe2/CC) 表现出对析氧反应 (OER) 和水分解的高效率。具有丰富 O 空位的 CeO2 有助于 OH 的吸附,并促进 CoSe2 在较低电位下重建为 CoOOH。原位生成的活性 CeO2@CoOOH 异质界面上移了 Co 位点的 d 波段中心,从而降低了 OER 过程中速率确定步骤 (RDS) 的自由能(*O 到 *OOH)。它在 10 mA cm-2 时提供 245 mV 的低 OER 过电位。还发现 CeO2@CoSe2/CC 对析氢反应具有活性(HER,10 mA cm-2 时 138 mV 过电位),受益于 CeO2 促进的 *H2O 解离和 *H 在 CoSe2 上的吸附。整体分解水是通过 CeO2@CoSe2/CC 双功能电极实现的,在 10 mA-2 下具有 1.54 V 的低电解电压。这项工作为 CeO2 辅助表面重构提供了有价值的见解,并通过界面工程提供了水电解催化剂。
更新日期:2024-11-10
down
wechat
bug