当前位置：
X-MOL 学术
›
Acc. Mater. Res.
›
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.)
Cation-Deficient Perovskites for Clean Energy Conversion
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2021-07-02 , DOI: 10.1021/accountsmr.1c00036 Chao Su 1, 2 , Wei Wang 3 , Zongping Shao 2, 3
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2021-07-02 , DOI: 10.1021/accountsmr.1c00036 Chao Su 1, 2 , Wei Wang 3 , Zongping Shao 2, 3
Affiliation
|
Clean energy conversion technologies can power progress for achieving a sustainable future, while functional materials lie at the core of these technologies. In particular, highly efficient electrocatalysts that are also cost-effective are of utmost concern in the development of several clean energy conversion technologies. These include fuel cells and water electrolyzers. It is well recognized that electrocatalysts are needed to greatly accelerate the kinetics of key electrochemical reactions involved in these energy conversion technologies. Perovskite oxides are being used as key materials that have provided impetus in the development of energy conversion and storage, in view of their flexibility in elemental composition. Over 90% of known elements are able to become incorporated into their metal cation sites, resulting in diversified properties. Several strategies can be used to tailor the intrinsic properties of perovskites, leading to the optimization of their catalytic activity for electrochemical reactions. Cation deficiency has received particular attention as a unique strategy since no other elements or phases are involved, thereby avoiding the unknown effects of foreign elements or phases on performance. In this Account, we present our recent contributions to the study of cation-deficient perovskite oxides in the context of their applications in clean energy conversion. This includes oxygen separation through mixed conducting membranes, which is important for clean combustion, electricity generation through both solid oxide fuel cells using chemical fuels and dye-sensitized solar cells, and hydrogen production from water through both solid oxide electrolysis cells at high temperatures and water electrolyzers at room temperature. The journey begins with a discussion of the defect chemistry and charge compensation mechanisms present in cation-deficient perovskite oxides and then we propose benefits from the cation deficiency strategy that can optimize the materials’ properties in terms of electrical conductivity, phase structure, oxygen vacancy concentration, oxygen ion and cation diffusion properties, and proton transportation. Thus, both the sintering behavior of materials and their catalytic activity is dramatically improved for key reactions such as oxygen reduction, oxygen evolution, hydrogen evolution, and iodine reduction. Accordingly, the remarkable increases in performance of the aforementioned energy conversion systems are achieved through adopting cation-deficient perovskites. At the end of this Account, we conclude with some suggestions on how future research can broaden the applications for cation-deficient perovskites.
中文翻译：
用于清洁能源转化的缺阳离子钙钛矿
清洁能源转换技术可以推动实现可持续未来的进步，而功能材料则是这些技术的核心。特别是具有成本效益的高效电催化剂是几种清洁能源转换技术开发中最受关注的问题。这些包括燃料电池和水电解槽。众所周知，需要电催化剂来大大加速这些能量转换技术中涉及的关键电化学反应的动力学。鉴于钙钛矿氧化物在元素组成方面的灵活性，它们被用作关键材料，为能量转换和存储的发展提供了动力。超过 90% 的已知元素能够结合到它们的金属阳离子位点中，从而产生多样化的特性。几种策略可用于调整钙钛矿的内在特性，从而优化其电化学反应的催化活性。阳离子缺乏作为一种独特的策略受到了特别关注，因为不涉及其他元素或相，从而避免了外来元素或相对性能的未知影响。在本报告中，我们介绍了我们最近在研究缺乏阳离子的钙钛矿氧化物在清洁能源转换中的应用方面的贡献。这包括通过混合导电膜分离氧气，这对于清洁燃烧很重要，通过使用化学燃料的固体氧化物燃料电池和染料敏化太阳能电池发电，以及通过高温下的固体氧化物电解槽和室温下的水电解槽从水中制氢。旅程开始于讨论缺阳离子钙钛矿氧化物中存在的缺陷化学和电荷补偿机制，然后我们提出了阳离子缺陷策略的好处，该策略可以优化材料在电导率、相结构、氧空位浓度方面的性能、氧离子和阳离子扩散特性以及质子传输。因此，对于氧还原、析氧、析氢和碘还原等关键反应，材料的烧结行为及其催化活性都得到了显着改善。因此，上述能量转换系统的性能显着提高是通过采用缺阳离子钙钛矿实现的。在本报告的最后，我们就未来的研究如何扩大缺阳离子钙钛矿的应用提出了一些建议。
更新日期：2021-07-23
中文翻译：
用于清洁能源转化的缺阳离子钙钛矿
清洁能源转换技术可以推动实现可持续未来的进步，而功能材料则是这些技术的核心。特别是具有成本效益的高效电催化剂是几种清洁能源转换技术开发中最受关注的问题。这些包括燃料电池和水电解槽。众所周知，需要电催化剂来大大加速这些能量转换技术中涉及的关键电化学反应的动力学。鉴于钙钛矿氧化物在元素组成方面的灵活性，它们被用作关键材料，为能量转换和存储的发展提供了动力。超过 90% 的已知元素能够结合到它们的金属阳离子位点中，从而产生多样化的特性。几种策略可用于调整钙钛矿的内在特性，从而优化其电化学反应的催化活性。阳离子缺乏作为一种独特的策略受到了特别关注，因为不涉及其他元素或相，从而避免了外来元素或相对性能的未知影响。在本报告中，我们介绍了我们最近在研究缺乏阳离子的钙钛矿氧化物在清洁能源转换中的应用方面的贡献。这包括通过混合导电膜分离氧气，这对于清洁燃烧很重要，通过使用化学燃料的固体氧化物燃料电池和染料敏化太阳能电池发电，以及通过高温下的固体氧化物电解槽和室温下的水电解槽从水中制氢。旅程开始于讨论缺阳离子钙钛矿氧化物中存在的缺陷化学和电荷补偿机制，然后我们提出了阳离子缺陷策略的好处，该策略可以优化材料在电导率、相结构、氧空位浓度方面的性能、氧离子和阳离子扩散特性以及质子传输。因此，对于氧还原、析氧、析氢和碘还原等关键反应，材料的烧结行为及其催化活性都得到了显着改善。因此，上述能量转换系统的性能显着提高是通过采用缺阳离子钙钛矿实现的。在本报告的最后，我们就未来的研究如何扩大缺阳离子钙钛矿的应用提出了一些建议。
京公网安备 11010802027423号