Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Rapidly reconstructing the active surface of cobalt-based perovskites for alkaline seawater splitting
Nanoscale ( IF 5.8 ) Pub Date : 2022-06-23 , DOI: 10.1039/d2nr01516a Ruigan Hu 1 , Mengyuan Zhao 2 , He Miao 1 , Fuyue Liu 1 , Jiaqun Zou 1 , Chunfei Zhang 1 , Qin Wang 3 , Ziqi Tian 2 , Qiuju Zhang 2 , Jinliang Yuan 1
Nanoscale ( IF 5.8 ) Pub Date : 2022-06-23 , DOI: 10.1039/d2nr01516a Ruigan Hu 1 , Mengyuan Zhao 2 , He Miao 1 , Fuyue Liu 1 , Jiaqun Zou 1 , Chunfei Zhang 1 , Qin Wang 3 , Ziqi Tian 2 , Qiuju Zhang 2 , Jinliang Yuan 1
Affiliation
|
As a potential oxygen evolution reaction (OER) catalyst, Co-based perovskites have received intensive attention. However, Sr readily accumulates on their surface, and makes them inert toward the OER. Herein, we propose a simple but versatile electrochemical reduction method to reconstruct the active surface of Co-based perovskites within a few seconds. By this method, Sr rapidly precipitates from Co-based perovskites, accompanied by the introduction of Sr and oxygen vacancies. After reconstruction, the electrochemical active surface areas of Co-based perovskites greatly increase, and the OER overpotential of the optimized SrNb0.1Co0.7Fe0.2O3−δ (ER-SNCF-20s) reaches 278 mV at 10 mA cm−2. This can be explained by the decrease of overpotentials at the rate-determining step. Using ER-SNCF-20s, the splitting voltage of alkaline natural seawater can reach 1.56 V at 10 mA cm−2, and remains steady for 300 h. This effort offers a feasible method for reconstructing the active surface of Co-based perovskites.
中文翻译：
快速重建钴基钙钛矿的活性表面用于碱性海水分解
作为一种潜在的析氧反应（OER）催化剂，钴基钙钛矿受到了广泛关注。然而，Sr 很容易积聚在它们的表面上，并使它们对 OER 呈惰性。在此，我们提出了一种简单但通用的电化学还原方法，可在几秒钟内重建钴基钙钛矿的活性表面。通过这种方法，Sr 从 Co 基钙钛矿中迅速沉淀出来，同时引入了 Sr 和氧空位。重构后，Co基钙钛矿的电化学活性表面积大大增加，优化后的SrNb 0.1 Co 0.7 Fe 0.2 O 3− δ (ER-SNCF-20s)的OER过电位在10 mA cm -2时达到278 mV. 这可以通过速率确定步骤中过电位的降低来解释。使用ER-SNCF-20s，碱性天然海水的分裂电压在10 mA cm -2时可以达到1.56 V ，并保持稳定300 h。这项工作为重建钴基钙钛矿的活性表面提供了一种可行的方法。
更新日期：2022-06-23
中文翻译：
快速重建钴基钙钛矿的活性表面用于碱性海水分解
作为一种潜在的析氧反应（OER）催化剂，钴基钙钛矿受到了广泛关注。然而，Sr 很容易积聚在它们的表面上，并使它们对 OER 呈惰性。在此，我们提出了一种简单但通用的电化学还原方法，可在几秒钟内重建钴基钙钛矿的活性表面。通过这种方法，Sr 从 Co 基钙钛矿中迅速沉淀出来，同时引入了 Sr 和氧空位。重构后，Co基钙钛矿的电化学活性表面积大大增加，优化后的SrNb 0.1 Co 0.7 Fe 0.2 O 3− δ (ER-SNCF-20s)的OER过电位在10 mA cm -2时达到278 mV. 这可以通过速率确定步骤中过电位的降低来解释。使用ER-SNCF-20s，碱性天然海水的分裂电压在10 mA cm -2时可以达到1.56 V ，并保持稳定300 h。这项工作为重建钴基钙钛矿的活性表面提供了一种可行的方法。
京公网安备 11010802027423号