Transition metal-based bimetallic MOFs and MOF-derived catalysts for electrochemical oxygen evolution reaction

Author(s): Songsong Li ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Yangqin Gao ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Ning Li ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Lei Ge ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Xianhui Bu ⁶ ^, ⁷ ^, ⁸ ^, ⁹ , Pingyun Feng ¹⁰ ^, ¹¹ ^, ¹² ^, ⁹

Publication date (Electronic): 2021

Journal: Energy & Environmental Science

Publisher: Royal Society of Chemistry (RSC)

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Abstract

The review summarizes transition metal-based bimetallic MOFs and their derived materials as electrocatalytic materials for the OER. The mechanisms of the OER as probed by DFT calculation and in situ characterization techniques are also discussed.

Abstract

The oxygen evolution reaction (OER) is a critical electrochemical reaction in water splitting and rechargeable metal–air batteries. It plays a pivotal role in achieving high-efficiency clean-energy production and energy storage in these devices. Transition metal-based bimetallic MOFs (TMB MOFs) with two different metal ions possess specific synergistic effects, which could exhibit OER performance and stability superior to those of the corresponding monometallic MOFs for water oxidation. Benefiting from the diversity of chemical composition and structural type, TMB MOFs can also serve as precursors and templates to obtain alloy-particle-decorated carbon materials with high surface area, or metal compounds such as bimetallic sulfides, phosphides, and hydroxides with atomic-level mixing of heterometallic elements. These materials with high-density active sites exhibit much improved catalytic activity in the water oxidation reaction. This article aims to review the recent progress with TMB MOFs and their derivatives in relation to applications as electrocatalysts in OER, including analysis of the mechanism of the OER process with the assistance of DFT calculations and in situ or operando techniques.

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Combining theory and experiment in electrocatalysis: Insights into materials design

Zhi Wei Seh, Jakob Kibsgaard, Colin F Dickens … (2017)

Electrocatalysis plays a central role in clean energy conversion, enabling a number of sustainable processes for future technologies. This review discusses design strategies for state-of-the-art heterogeneous electrocatalysts and associated materials for several different electrochemical transformations involving water, hydrogen, and oxygen, using theory as a means to rationalize catalyst performance. By examining the common principles that govern catalysis for different electrochemical reactions, we describe a systematic framework that clarifies trends in catalyzing these reactions, serving as a guide to new catalyst development while highlighting key gaps that need to be addressed. We conclude by extending this framework to emerging clean energy reactions such as hydrogen peroxide production, carbon dioxide reduction, and nitrogen reduction, where the development of improved catalysts could allow for the sustainable production of a broad range of fuels and chemicals.

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Structural absorption by barbule microstructures of super black bird of paradise feathers

Dakota E. McCoy, Teresa J. Feo, Todd Alan Harvey … (2018)

Many studies have shown how pigments and internal nanostructures generate color in nature. External surface structures can also influence appearance, such as by causing multiple scattering of light (structural absorption) to produce a velvety, super black appearance. Here we show that feathers from five species of birds of paradise (Aves: Paradisaeidae) structurally absorb incident light to produce extremely low-reflectance, super black plumages. Directional reflectance of these feathers (0.05–0.31%) approaches that of man-made ultra-absorbent materials. SEM, nano-CT, and ray-tracing simulations show that super black feathers have titled arrays of highly modified barbules, which cause more multiple scattering, resulting in more structural absorption, than normal black feathers. Super black feathers have an extreme directional reflectance bias and appear darkest when viewed from the distal direction. We hypothesize that structurally absorbing, super black plumage evolved through sensory bias to enhance the perceived brilliance of adjacent color patches during courtship display.