A Highly Selective CuZnY Catalyst for CO2 Hydrogenation to Methanol

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-23 DOI:10.1007/s10562-025-05048-y

Yao Cai, Qi Wang, Dingran Wang, Tianfu Zhang, Ting Fan, Di Fu, Yanghui Lu, Gonggang Sun, Xinbao Li, Kaige Wang

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引用次数: 0

Abstract

Achieving carbon neutrality through CO₂ hydrogenation is critical for sustainable energy and chemical industries, where methanol production remains a key target. Despite existing catalysts, challenges persist in low CO₂ conversion, poor methanol selectivity, and activity instability. This study introduces a novel ternary Cu/Zn/Y catalyst synthesized via co-precipitation to address these limitations. Tested under 5 MPa, 250 °C, H₂/CO₂ = 3:1, and 12,000 h⁻¹, the catalyst achieved a CO₂ conversion rate of 16.6% and a methanol selectivity of 56.6%, outperforming the CuZnAl benchmark with a 14.3% higher methanol space-time yield (402.3 mg/(gcat·h)). Optimal yttrium doping enhanced methanol selectivity by 20%, attributed to improved copper dispersion. However, excess Y occupancy disrupted Cu–Zn interactions, reducing CO₂ conversion and stability, highlighting critical trade-offs. These insight underscore the potential of Cu/Zn/Y catalysts for carbon-neutral technologies and emphasize the need for optimized Y doping to balance selectivity and stability.

Graphical Abstract

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CO2加氢制甲醇的高选择性CuZnY催化剂

通过二氧化碳加氢实现碳中和对于可持续能源和化学工业至关重要，其中甲醇生产仍然是一个关键目标。尽管已有催化剂，但其二氧化碳转化率低、甲醇选择性差、活性不稳定等问题依然存在。本研究通过共沉淀法合成一种新型三元Cu/Zn/Y催化剂来解决这些限制。在5 MPa、250℃、H2/CO2 = 3:1、12,000 h⁻¹条件下测试，该催化剂的CO2转化率为16.6%，甲醇选择性为56.6%，甲醇时空产率（402.3 mg/(gcat·h)）比CuZnAl基准高14.3%。最佳的钇掺杂使甲醇选择性提高了20%，这是由于铜的分散性得到了改善。然而，过量的Y占用破坏了Cu-Zn相互作用，降低了CO2的转化和稳定性，突出了关键的权衡。这些发现强调了Cu/Zn/Y催化剂在碳中性技术中的潜力，并强调了优化Y掺杂以平衡选择性和稳定性的必要性。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.