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Design of Highly Durable Core−Shell Catalysts by Controlling Shell Distribution Guided by In-Situ Corrosion Study
Advanced Materials ( IF 29.4 ) Pub Date : 2021-08-04 , DOI: 10.1002/adma.202101511 Fenglei Shi 1 , Jiaheng Peng 1 , Fan Li 1 , Ningkang Qian 2 , Hao Shan 1 , Peng Tao 1 , Chengyi Song 1 , Wen Shang 1 , Tao Deng 1, 3 , Hui Zhang 2 , Jianbo Wu 1, 3, 4
Advanced Materials ( IF 29.4 ) Pub Date : 2021-08-04 , DOI: 10.1002/adma.202101511 Fenglei Shi 1 , Jiaheng Peng 1 , Fan Li 1 , Ningkang Qian 2 , Hao Shan 1 , Peng Tao 1 , Chengyi Song 1 , Wen Shang 1 , Tao Deng 1, 3 , Hui Zhang 2 , Jianbo Wu 1, 3, 4
Affiliation
Most degradations in electrocatalysis are caused by corrosion in operation, for example the corrosion of the core in a core−shell electrocatalyst during the oxygen reduction reaction (ORR). Herein, according to the in-situ study on nanoscale corrosion kinetics via liquid cell transmission electron microscopy (LC-TEM) in the authors’ previous work, they sequentially designed an optimized nanocube with the protection of more layers on the corners by adjusting the Pt atom distribution on corners and terraces. This modified nanocube (MNC) is much more corrosion resistant in the in-situ observation. Furthermore, in the practical electrochemical stability testing, the MNC catalyst also showed the best stability performance with the 0.37% and 9.01% loss in specific and mass activity after 30 000 cycles accelerated durability test (ADT). This work also demonstrates that how an in-situ study can guide the design of desired materials with improved properties and build a bridge between in-situ study and practical application.
中文翻译:
以原位腐蚀研究为指导,通过控制壳分布来设计高度耐用的核壳催化剂
电催化中的大多数降解是由操作中的腐蚀引起的,例如在氧还原反应 (ORR) 期间核壳电催化剂中的核的腐蚀。在此,根据作者之前工作中通过液体细胞透射电子显微镜(LC-TEM)对纳米级腐蚀动力学进行的原位研究,他们通过调整 Pt角落和平台上的原子分布。这种改性纳米立方体 (MNC) 在原位观察中更耐腐蚀。此外,在实际电化学稳定性测试中,MNC催化剂在30 000次循环加速耐久性测试(ADT)后也表现出最佳的稳定性,比活性和质量活性分别下降0.37%和9.01%。
更新日期:2021-09-21
中文翻译:
以原位腐蚀研究为指导,通过控制壳分布来设计高度耐用的核壳催化剂
电催化中的大多数降解是由操作中的腐蚀引起的,例如在氧还原反应 (ORR) 期间核壳电催化剂中的核的腐蚀。在此,根据作者之前工作中通过液体细胞透射电子显微镜(LC-TEM)对纳米级腐蚀动力学进行的原位研究,他们通过调整 Pt角落和平台上的原子分布。这种改性纳米立方体 (MNC) 在原位观察中更耐腐蚀。此外,在实际电化学稳定性测试中,MNC催化剂在30 000次循环加速耐久性测试(ADT)后也表现出最佳的稳定性,比活性和质量活性分别下降0.37%和9.01%。