具有间隙碳的单位点铂掺杂二氧化钌空心纳米球用于高性能酸性全水解。

Single-site Pt-doped RuO hollow nanospheres with interstitial C for high-performance acidic overall water splitting.

作者信息

Wang Juan, Yang Hao, Li Fan, Li Leigang, Wu Jianbo, Liu Shangheng, Cheng Tao, Xu Yong, Shao Qi, Huang Xiaoqing

机构信息

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.

Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.

出版信息

Sci Adv. 2022 Mar 4;8(9):eabl9271. doi: 10.1126/sciadv.abl9271. Epub 2022 Mar 2.

Realizing stable and efficient overall water splitting is highly desirable for sustainable and efficient hydrogen production yet challenging because of the rapid deactivation of electrocatalysts during the acidic oxygen evolution process. Here, we report that the single-site Pt-doped RuO hollow nanospheres (SS Pt-RuO HNSs) with interstitial C can serve as highly active and stable electrocatalysts for overall water splitting in 0.5 M HSO. The performance toward overall water splitting have surpassed most of the reported catalysts. Impressively, the SS Pt-RuO HNSs exhibit promising stability in polymer electrolyte membrane electrolyzer at 100 mA cm during continuous operation for 100 hours. Detailed experiments reveal that the interstitial C can elongate Ru-O and Pt-O bonds, and the presence of SS Pt can readily vary the electronic properties of RuO and improve the OER activity by reducing the energy barriers and enhancing the dissociation energy of O species.

实现稳定且高效的全水分解对于可持续和高效的制氢而言是非常可取的，但由于在酸性析氧过程中电催化剂的快速失活，这一过程具有挑战性。在此，我们报道了具有间隙碳的单原子铂掺杂的RuO空心纳米球（SS Pt-RuO HNSs）可作为在0.5 M H₂SO₄中进行全水分解的高活性和稳定的电催化剂。其全水分解性能已超过大多数已报道的催化剂。令人印象深刻的是，SS Pt-RuO HNSs在聚合物电解质膜电解槽中以100 mA cm⁻²连续运行100小时期间表现出良好的稳定性。详细实验表明，间隙碳可拉长Ru-O和Pt-O键，并且单原子铂的存在能够轻易改变RuO的电子性质，并通过降低能垒和提高O物种的解离能来提高析氧反应活性。