通过沥滤提高使用寿命

IF 49.7 1区 材料科学 Q1 ENERGY & FUELS Nature Energy Pub Date : 2024-07-25 DOI:10.1038/s41560-024-01593-9
James Gallagher
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引用次数: 0

摘要

质子交换膜(PEM)水电解槽可高效生产高纯度氢气。此外,由于其快速的动态响应能力,它们也是与可再生能源耦合的理想选择。然而,PEM 电解槽中反应环境的酸性会对许多材料造成腐蚀,这就限制了阳极(产生 O2 的地方)催化剂的选择,使其主要局限于基于铱的催化剂,而铱是一种稀有且昂贵的金属。例如,虽然钴基氧化物被认为具有接近铱的活性,但由于钴离子的溶解,其稳定性通常很差。现在,西班牙、法国和英国的 F. Pelayo García de Arquer 及其同事报告了一种无铱的分层钨酸钴催化剂,这种催化剂可在 80 °C 的 PEM 电解槽中以 1 A cm-2 的电流密度运行 608 小时。研究人员通过水热法合成 CoWO4,然后将其分散在 0.1 M KOH 中;由于 WO42- 阴离子的浸出,这种处理方法产生了具有大量空位的分层片状结构。研究小组发现,分层材料含有高密度的截留水和氢氧基团,与 Co3O4 相反,这使得钴离子的溶解在热力学上是不利的。这种耐久性反映在标准两室电化学电池测试和 PEM 电解槽运行中观察到的强大稳定性上。催化剂的活性也很显著,研究人员在 PEM 电解槽中记录到 2 V 时的电流密度为 1.8 A cm-2。
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来源期刊
Nature Energy
Nature Energy Energy-Energy Engineering and Power Technology
CiteScore
75.10
自引率
1.10%
发文量
193
期刊介绍: Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.
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