Efficient Electron Transfer from Electron‐Sponge Polyoxometalate to Single‐Metal Site Metal–Organic Frameworks for Highly Selective Electroreduction of Carbon Dioxide

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202100762. conversion are potential methods to lower CO 2 concentration in the atmosphere. [2][3][4] In contrast to CO 2 capture, CO 2 conversion is more promising, as it can convert CO 2 into low-carbon fuels or other valuable chemicals such as CO, CH 4 , HCOOH, and C 2 H 5 OH. [5][6][7][8] Importantly, for industrial applications, CO 2 reduction reaction (CO 2 RR) is considered to be a practical and potentially valuable method for the generation of clean, renewable energy that can be undertaken even at room temperature and ambient pressure. [9][10][11][12][13] Given the high thermodynamic stability, the low electron affinity of CO 2 molecules, and the competitive reaction of hydrogen evolution in the formation of the desired products, a highly selective and efficient catalyst for CO 2 RR is urgently needed. [14][15][16][17][18][19][20][21] In recent years, metal-organic frameworks (MOFs) composed of various transition metals ions and organic linkers have emerged in the field of electrocatalysis. [22,23] Compared with noble metals, transition metal chalcogenides, and other catalytic materials, MOFs feature very large specific surface

Exploiting Redox-Complementary Peptide/Polyoxometalate Coacervates for Spontaneously Curing into Antimicrobial Adhesives

“…Cysteine is one of the most reactive amino acids in nature, and its thiol side chain could be moderately oxidized into disulfide linkage, which plays a vital role in stabilizing the folding structures of proteins. , The incorporating of cysteine into peptide coacervates may enable the artificial system to be cured via an ingenious choice of oxidants. It has been known that POMs are a kind of oxidative polyanions with monodispersed size, well-defined topology, chemical diversity, and bioacitvity. − In particular, molybdenum- or vanadium-substituted POMs have the capacity to oxidize the cysteine into cystine at room temperature. , These versatile properties of POMs fascinated us, who are intrigued with the idea of regulating the coacervation of cysteine-containing peptide segments and their subsequent curing under the water line. In the present study, we designed and synthesized two kinds of redox-complementary peptide/POM coacervates.…”

Metal–Organic Framework‐Based Electrocatalysts for CO2 Reduction

“…The transportation of electrons can be facilitated by incorporating POMs into MOFs channels and finally the performance of the active site can be improved. For example, Lan and coworkers [ 134 ] reported POM@PCN‐222(Co) composite by combining the electron rich structure of POM and high surface area of MOF ( Figure ). As expected, the electron transfer property of composite material was considerably improved and a particular composite named H‐POM@PCN‐222(Co) showed better CO 2 RR performance with 96.2% FE CO at −0.8 V versus RHE and stability of 10 h. Further, DFT calculations revealed that Co single sites in PCN‐222(Co) were improved by directional electron transfer in the composite and reduced the energy barrier for the rate‐determining step.…”

Rational design of covalent organic frameworks for efficient photocatalytic hydrogen peroxide production

“…28–30 With respect to inorganic materials, light absorption of meta-free photocatalyst can be readily optimized by rational design of the molecular structure. 31–33 In addition, metal-free photocatalysts are favoured to proceed one-electron process, while two-electron process is avoided for hydrogen evolution reaction as shown in eqn (3). 34 2H + + 2e − → H 2 (−0 V vs. NHE)…”