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.)
In Situ Electrochemical Oxyanion Steering of Water Oxidation Electrocatalysts for Optimized Activity and Stability
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2023-05-04 , DOI: 10.1002/aenm.202300765 Xunlu Wang 1, 2 , Ruguang Ma 3 , Shanlin Li 1 , Mengmeng Xu 4 , Lijia Liu 5 , Yihan Feng 1, 2 , Tiju Thomas 6 , Minghui Yang 4 , Jiacheng Wang 1, 2, 7, 8
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2023-05-04 , DOI: 10.1002/aenm.202300765 Xunlu Wang 1, 2 , Ruguang Ma 3 , Shanlin Li 1 , Mengmeng Xu 4 , Lijia Liu 5 , Yihan Feng 1, 2 , Tiju Thomas 6 , Minghui Yang 4 , Jiacheng Wang 1, 2, 7, 8
Affiliation
|
Compared to traditional modulation by metal cations doping, oxyanions offer a higher possibility of mediating the performance of electrocatalysts toward oxygen evolution reaction (OER) due to their special polyanion configurations and large electronegativity. However, the mechanism and rules of oxyanions mediation remain poorly understood. Herein, an in situ electrochemical oxyanion (NO3−, PO43−, SO42−, or SeO42−) steering strategy to study the variation and rules of OER performance for transition-metal (TM = Ni, Fe, Co) hydroxide electrocatalysts is reported. Electrocatalytic experiments indicate both activity and stability of oxyanion-modified TM hydroxides follow the order of PO43− > NO3− > SO42− > SeO42−. Electrochemical incorporation of PO43− or NO3− improves activity and stability of TM hydroxides. Conversely, SO42− or SeO42− doping significantly accelerates TM leaching and thus impairs OER performance. Theoretical calculations reveal that electrochemical oxyanion doping simultaneously modulates TM-O covalency and TM-3d band centers, correlating with TM stability and OER activity of TM hydroxides. This research constructs an oxyanion-mediated rule for designing high-performance electrocatalysts toward energy transformation.
中文翻译：
原位电化学氧阴离子控制水氧化电催化剂以优化活性和稳定性
与传统的金属阳离子掺杂调制相比，氧阴离子由于其特殊的聚阴离子构型和大的电负性，在介导电催化剂的析氧反应（OER）性能方面提供了更高的可能性。然而，人们对氧阴离子介导的机制和规则仍知之甚少。本文采用原位电化学氧阴离子（NO 3 −、PO 4 3−、SO 4 2−或 SeO 4 2−）调控策略来研究过渡金属（TM = Ni、Fe、报道了Co)氢氧化物电催化剂。电催化实验表明，氧阴离子修饰的TM氢氧化物的活性和稳定性均遵循PO顺序4 3− > NO 3 − > SO 4 2− > SeO 4 2−。PO 4 3−或NO 3 −的电化学结合提高了TM 氢氧化物的活性和稳定性。相反，SO 4 2−或 SeO 4 2−掺杂会显着加速 TM 浸出，从而损害 OER 性能。理论计算表明电化学氧阴离子掺杂同时调节TM-O共价键和TM- 3d带中心，与 TM 稳定性和 TM 氢氧化物的 OER 活性相关。这项研究构建了一种氧阴离子介导的规则，用于设计用于能量转化的高性能电催化剂。
更新日期：2023-05-04
中文翻译：
原位电化学氧阴离子控制水氧化电催化剂以优化活性和稳定性
与传统的金属阳离子掺杂调制相比，氧阴离子由于其特殊的聚阴离子构型和大的电负性，在介导电催化剂的析氧反应（OER）性能方面提供了更高的可能性。然而，人们对氧阴离子介导的机制和规则仍知之甚少。本文采用原位电化学氧阴离子（NO 3 −、PO 4 3−、SO 4 2−或 SeO 4 2−）调控策略来研究过渡金属（TM = Ni、Fe、报道了Co)氢氧化物电催化剂。电催化实验表明，氧阴离子修饰的TM氢氧化物的活性和稳定性均遵循PO顺序4 3− > NO 3 − > SO 4 2− > SeO 4 2−。PO 4 3−或NO 3 −的电化学结合提高了TM 氢氧化物的活性和稳定性。相反，SO 4 2−或 SeO 4 2−掺杂会显着加速 TM 浸出，从而损害 OER 性能。理论计算表明电化学氧阴离子掺杂同时调节TM-O共价键和TM- 3d带中心，与 TM 稳定性和 TM 氢氧化物的 OER 活性相关。这项研究构建了一种氧阴离子介导的规则，用于设计用于能量转化的高性能电催化剂。
京公网安备 11010802027423号