A Derivative of ZnIn₂S₄ Nanosheet Supported Pd Boosts Selective CO₂ Hydrogenation

Abstract

CO2 hydrogenation to value‐added chemicals has been considered as a promising way to reduce CO2 emission and alleviate energy crisis. However, the high‐efficiency CO2 hydrogenation process is driven by the current drawbacks of low activity and/or selectivity. Herein, it is demonstrated that 2D S‐doped ZnInOx, which evolves from the calcination of ZnIn2S4 nanosheets (ZIS NSs), can serve as a functional support for Pd nanoparticles (NPs) to promote the selective CO2 hydrogenation to CH3OH. Detailed investigations show that ZnIn2S4 will evolve into In2O3 and amorphous S‐doped ZnO, on which Pd NPs are preferentially located due to the strong electrophilicity of S. Consequently, the strong interaction between Pd NPs and amorphous S‐doped ZnO prevents Pd NPs from sintering and facilitates the selective CO2 hydrogenation to produce CH3OH. The optimal catalyst shows a CO2 conversion of 12.7% with a CH3OH selectivity of 87.4% at 280 °C. This study provides a facile route to regulate catalytic supports and controllably load active species, which may attract great research interests in the fields of heterogeneous catalysis.

Electrocatalytic synthesis of C–N coupling compounds from CO2 and nitrogenous species

“…Carbon dioxide (CO 2 ) emitted from fossil fuel utilization is a greenhouse gas, contributing to temperature increase and associated environmental and social challenges that deeply impact human life. Thus, there is an urgent need to capture [1][2][3] and utilize [4][5][6][7][8][9] CO 2 to mitigate and balance its concentration in the atmosphere. Amine scrubbing presently stands as a robust and proven technology for CO 2 capture, 10 paving the way for downstream CO 2 utilization on an industrial scale.…”

Review of Mechanism Investigations and Catalyst Developments for CO2 Hydrogenation to Alcohols

“…There are various chemical processes for effective CO 2 utilization, for example, thermal catalysis, electrocatalysis, photocatalysis and organic catalysis synthesis, etc. [2][3][4][5], which can obtain many valuable products, e.g., CO, methane, olefins, aromatics, gasoline, urea, alcohols and so on [6][7][8][9][10][11][12]. However, chemical conversion of CO 2 is usually formidably challenging in both scientific and technical areas, due to it being thermodynamically stable and chemically inert [13].…”

Double-Edged Sword Effect of Classical Strong Metal–Support Interaction in Catalysts for CO2 Hydrogenation to CO, Methane, and Methanol

“… The thermochemical hydrogenation of CO 2 to energy products and value-added chemicals is a “two birds, one stone” strategy to address the serious energy shortages and global warming issues. − Generally, various chemicals can be produced via CO 2 hydrogenation reactions, including but not limited to CO, methane (CH 4 ), methanol (MeOH), olefins, aromatics, and gasolines . Among these, the synthesis of basic C1 chemicals (CO, CH 4 , and MeOH) has been the focus of research in the past few decades, since they can be utilized as fuels or as key precursors to synthesize more complex energy products, such as olefins, dimethyl ether (DME), longer-chain alcohols, and hydrocarbons. − Given the potential of these three major C1 products for CO 2 recycling and optimizing energy structures, currently an urgent demand is the development of excellent CO 2 hydrogenation catalysts. − …”