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Activity, selectivity, and stability of earth-abundant CuO/Cu2O/Cu0-based photocatalysts toward CO2 reduction

Activity, selectivity, and stability of earth-abundant CuO/Cu2O/Cu0-based photocatalysts toward CO2 reduction
Ali, ShahzadRazzaq, AbdulKim, HwapyongIn, Su-Il
Issued Date
Chemical Engineering Journal, v.429
Author Keywords
Photocatalytic activityPlasmonic photocatalystsSelectivityStabilityC2+ productsCO2 photoreductionCu-based photocatalystHeterostructured photocatalystInterfacial charge transfer
Charge transferCopperCopper oxidesLight absorptionOxidationPhotocatalytic activityReaction intermediatesSpectroscopic analysisStabilitySubstratesC2+ productCO2 photoreductionCu-basedCu-based photocatalystHeterostructured photocatalystInterfacial charge transferOxidation statePhoto reductionPlasmonic photocatalystsSelectivityCarbon dioxide
Cu-based photocatalysts are widely used for the photocatalytic reduction of CO2 owing to their non-toxicity, earth abundance, extended light absorption, suppressed charge recombination, and good catalytic performance. In addition to low cost, abundant availability, and the ease of synthesis, they exhibit unique features, such as broad optical absorption, reaction intermediates stabilization, and C–C coupling ability, which lead to the formation of C2 + products. The photocatalytic activity of Cu-based photocatalysts is essentially linked to the optical absorption and interfacial charge transfer at the junction of Cu and the semiconductor substrate. However, the poor resistance of Cu to oxidation seriously perturbs the effective utilization of its unique features in practical applications. To date, various approaches, such as the use of metal/non-metal co-catalysts, Z-scheme heterostructures, and hole scavengers, have been proposed to improve its photocatalytic performance and maintain its stability in prolonged reactions. In addition to these approaches, as single metal atom catalysts, atomically dispersed Cu photocatalysts have gained immense attention because they can regain the desired oxidation state, and hence exhibit good stability. The designation of suitable oxidation states of Cu for various CO2 reduction reaction steps is challenging because of the rapid change in its oxidation states under ambient/irradiated environments. However, in situ spectroscopic analyses have nominated Cu2+ for CO2 adsorption, Cu1+ for the photoreduction reaction, and Cu0 for effective charge separation. In this review, the recent advancements in the photocatalytic activity, selectivity, and stability of Cu-based photocatalysts are discussed systematically. Certain concepts and mechanisms related to the photocatalytic performance of Cu-based catalysts have also been discussed. Finally, the future research directions are discussed based on the available relevant literature. © 2021 Elsevier B.V.
Elsevier BV
Related Researcher
  • 인수일 In, Su-Il 에너지공학과
  • Research Interests CO2 conversion to hydrocarbon fuels; Water splitting for hydrogen generation; Quantum dot devices; Dye sensitized solar cells; Environmental remediation; Synthesis of functional nanomaterials; CO2 연료전환; 수소생산을 위한 광전기화학적 물분해; 양자점 태양전지; 염료감응 태양전지; 공해물질 저감연구; 기능성 나노소재 개발
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Department of Energy Science and Engineering Green and Renewable Energy for Endless Nature(GREEN) Lab 1. Journal Articles


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