What question did this study set out to answer?

To investigate the divergent catalytic influences and mechanistic pathways of platinum versus gold loading on the metal–organic framework NH2-MIL-125(Ti) during visible-light photocatalysis.

March 18, 2014Chemistry - A European Journal

Noble Metals Can Have Different Effects on Photocatalysis Over Metal–Organic Frameworks (MOFs): A Case Study on M/NH2‐MIL‐125(Ti) (M=Pt and Au)

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Authors

DSDengrong SunSichuan University WLWenjun LiuBeijing University of Posts and Telecommunications YFYanghe FuMinistry of Education

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Implication

Experimental study demonstrates contrasting effects of platinum and gold doping on CO2 reduction in NH2-MIL-125(Ti), revealing a hydrogen spillover mechanism that boosts formate production.

Key Points

To investigate the divergent catalytic influences and mechanistic pathways of platinum versus gold loading on the metal–organic framework NH2-MIL-125(Ti) during visible-light photocatalysis.
Synthesized Pt- and Au-doped NH2-MIL-125(Ti) via wetness impregnation followed by hydrogen flow thermal reduction, with structural verification via XRD, XPS, XAFS, BET, and UV/Vis DRS.
Evaluated photocatalytic hydrogen evolution and CO2 reduction under visible-light irradiation in a CO2-saturated system using triethanolamine as a sacrificial electron donor.
Investigated reaction mechanisms and electronic transfer behaviors through electron spin resonance spectroscopy and density functional theory calculations.
Both Pt- and Au-doped catalysts promoted hydrogen evolution alongside formate production, contrasting with pristine NH2-MIL-125(Ti), which produced solely formate.
Pt loading markedly enhanced photocatalytic formate yield compared to the pristine MOF, whereas Au loading exerted an inhibitory effect on formate formation.
Mechanistic evaluations demonstrated hydrogen spillover from Pt nanoparticles to the NH2-MIL-125(Ti) framework, which actively accelerated photocatalytic CO2 reduction.

Cite This Study

Sun et al. (2014) studied this question.

synapsesocial.com/papers/69d6d02ffca0359822aa8a95 https://doi.org/10.1002/chem.201304067

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Implication

Experimental study demonstrates contrasting effects of platinum and gold doping on CO2 reduction in NH2-MIL-125(Ti), revealing a hydrogen spillover mechanism that boosts formate production.

Noble Metals Can Have Different Effects on Photocatalysis Over Metal–Organic Frameworks (MOFs): A Case Study on M/NH2‐MIL‐125(Ti) (M=Pt and Au)

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Cite This Study

Noble Metals Can Have Different Effects on Photocatalysis Over Metal–Organic Frameworks (MOFs): A Case Study on M/NH2‐MIL‐125(Ti) (M=Pt and Au)

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