Perovskites based on earth-abundant elements as robust catalysts for photo-driven oxygen production

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-03-17 DOI:10.1016/j.materresbull.2025.113437

Antonino Arrigo , Giuseppina La Ganga , Francesco Nastasi , Ambra Maria Cancelliere , Juan Manuel Coronado , Candida Milone , Emanuela Mastronardo

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Abstract

The oxygen evolution step is still the bottleneck in the architecture of an artificial photosynthetic system. Nowadays, several catalysts for photo-induced water oxidation have been investigated. However, the challenge consists of designing catalysts that are robust, efficient, and, at the same time, composed of elements that are non-toxic and widely available on the Earth's crust. We prepared a robust and cost-effective catalyst with intriguing performance for oxygen evolution through simple doping. The synthesis, characterisation, and photocatalytic studies on two perovskites based on earth-abundant elements, CaMnO₃ and CaMn_0.7Fe_0.3O_3-δ0, are reported. Both perovskites act as productive catalysts for water oxidation, and specifically, doping CaMnO₃ oxide with iron increases its photocatalytic activity. Remarkably, as a further advantage, CaMn_0.7Fe_0.3O_3-δ0 appears as a stable compound, which remains unmodified after five consecutive oxygen evolution cycles, thus making it a reusable catalyst for more than one photocatalytic process.

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基于地球丰富元素的钙钛矿作为光驱动制氧的强大催化剂

析氧步骤仍然是构建人工光合系统的瓶颈。目前，对光诱导水氧化的几种催化剂进行了研究。然而，面临的挑战包括设计出坚固、高效的催化剂，同时，由地壳中广泛存在的无毒元素组成。我们通过简单的掺杂制备了一种性能优异的催化剂。报道了两种钙钛矿CaMnO3和CaMn0.7Fe0.3O3-δ0的合成、表征及其光催化研究。这两种钙钛矿都是水氧化的生产催化剂，特别是，铁掺杂CaMnO3氧化物增加了其光催化活性。值得注意的是，作为进一步的优势，CaMn0.7Fe0.3O3-δ0表现为一种稳定的化合物，在连续五次析氧循环后仍未被修饰，从而使其成为可重复使用的催化剂，可用于多个光催化过程。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.