当前位置：
X-MOL 学术
›
ACS Catal.
›
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.)
Manipulating the Corrosion Resistance of SnO2 Aerogels through Doping for Efficient and Durable Oxygen Evolution Reaction Electrocatalysis in Acidic Media
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-05-04 , DOI: 10.1021/acscatal.0c01084 Sofyane Abbou 1 , Raphaël Chattot 1 , Vincent Martin 1 , Fabien Claudel 1 , Lluís Solà-Hernandez 2 , Christian Beauger 2 , Laetitia Dubau 1 , Frédéric Maillard 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-05-04 , DOI: 10.1021/acscatal.0c01084 Sofyane Abbou 1 , Raphaël Chattot 1 , Vincent Martin 1 , Fabien Claudel 1 , Lluís Solà-Hernandez 2 , Christian Beauger 2 , Laetitia Dubau 1 , Frédéric Maillard 1
Affiliation
|
Implementing iridium oxide (IrOx) nanocatalysts can be a major breakthrough for oxygen evolution reaction (OER), the limiting reaction in polymer electrolyte membrane water electrolyzer devices. However, this strategy requires developing a support that is electronically conductive, is stable in OER conditions, features a large specific surface area and a porosity adapted to gas–liquid flows. To address these challenges, we synthesized IrOx nanoparticles, supported them on doped SnO2 aerogels (IrOx/doped SnO2), and assessed their electrocatalytic activity toward the OER and their resistance to corrosion in acidic media by means of a flow cell connected to an inductively coupled mass spectrometer (FC-ICP-MS). The FC-ICP-MS results show that the long-term OER activity of IrOx/doped SnO2 aerogels is controlled by the resistance to corrosion of the doping element, and by its concentration in the host SnO2 matrix. In particular, we provide quantitative evidence that Sb-doped SnO2 supports continuously dissolve while Ta-doped or Nb-doped SnO2 supports with appropriate doping concentrations are stable under acidic OER conditions. These results shed fundamental light on the complex equilibrium existing between SnO2 and the doping element oxide. They also open a reliable path to develop highly active and robust IrOx nanocatalysts for OER in acidic media.
中文翻译：
通过掺杂操纵SnO 2气凝胶的耐蚀性，以在酸性介质中进行高效持久的氧析出反应电催化
实施氧化铱（IrO x）纳米催化剂可以成为氧释放反应（OER）的重大突破，而OER是聚合物电解质膜水电解装置中的限制性反应。但是，该策略需要开发一种导电的载体，该载体在OER条件下稳定，具有大的比表面积和适合气液流动的孔隙率。为了应对这些挑战，我们合成了IrO x纳米颗粒，并在掺杂的SnO 2气凝胶（IrO x /掺杂的SnO 2），并通过连接到电感耦合质谱仪（FC-ICP-MS）的流通池评估了它们对OER的电催化活性以及在酸性介质中的耐腐蚀性。FC-ICP-MS结果表明，IrO x /掺杂SnO 2气凝胶的长期OER活性受掺杂元素的耐腐蚀性能及其在主体SnO 2基质中的浓度控制。尤其是，我们提供了定量证据，表明掺Sb的SnO 2载体会持续溶解，而掺Ta或掺Nb的SnO 2载体（具有适当的掺杂浓度）在酸性OER条件下是稳定的。这些结果为SnO之间存在的复杂平衡提供了基本的认识。2，掺杂元素的氧化物。他们还为在酸性介质中开发用于OER的高活性和强健的IrO x纳米催化剂开辟了一条可靠的道路。
更新日期：2020-07-02
中文翻译：
通过掺杂操纵SnO 2气凝胶的耐蚀性，以在酸性介质中进行高效持久的氧析出反应电催化
实施氧化铱（IrO x）纳米催化剂可以成为氧释放反应（OER）的重大突破，而OER是聚合物电解质膜水电解装置中的限制性反应。但是，该策略需要开发一种导电的载体，该载体在OER条件下稳定，具有大的比表面积和适合气液流动的孔隙率。为了应对这些挑战，我们合成了IrO x纳米颗粒，并在掺杂的SnO 2气凝胶（IrO x /掺杂的SnO 2），并通过连接到电感耦合质谱仪（FC-ICP-MS）的流通池评估了它们对OER的电催化活性以及在酸性介质中的耐腐蚀性。FC-ICP-MS结果表明，IrO x /掺杂SnO 2气凝胶的长期OER活性受掺杂元素的耐腐蚀性能及其在主体SnO 2基质中的浓度控制。尤其是，我们提供了定量证据，表明掺Sb的SnO 2载体会持续溶解，而掺Ta或掺Nb的SnO 2载体（具有适当的掺杂浓度）在酸性OER条件下是稳定的。这些结果为SnO之间存在的复杂平衡提供了基本的认识。2，掺杂元素的氧化物。他们还为在酸性介质中开发用于OER的高活性和强健的IrO x纳米催化剂开辟了一条可靠的道路。
京公网安备 11010802027423号