Journal
ACS ENERGY LETTERS
Volume 4, Issue 12, Pages 2945-2951Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b01992
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Funding
- National Natural Science Foundation of China [21776322, 21576298, 21706239]
- Zhejiang Provincial Natural Science Foundation [LQ17B060001]
- Foshan Nanhai Economic and Technological Promotion Bureau Project [20177611071010007, 20177611071010008]
- Fundamental Research Funds for the Central Universities [20187611031610004]
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Direct oxidation of methane to methanol is desired for high value-added utilization of natural gas, but it remains a challenge. Herein, we present a highly mixed hybrid oxide, IrO2/Cu, prepared using a bottom-up tactic, namely, nanoparticle synthesis, encapsulation by Cu-containing metal-organic frameworks, and in situ oxidation, as an advanced catalyst for methane oxidation to methanol. Through the synergistic function of IrO2 for CH4 activation and CuO for selective oxidation, an inspired methanol batch yield of 872 mu mol g(-1) is achieved under mild feeding conditions of 3 bar CH4/1 bar air in water at 150 degrees C for 3 h with a robust cyclic stability. Upon elevating the CH4 feeding pressure to 20 bar, the methanol yield reaches as high as 1937 mu mol g(-1), which is among the best state-of-the-art values.
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