期刊
ACS CATALYSIS
卷 9, 期 10, 页码 9188-9198出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.9b01977
关键词
hydrogen production; continuous flow; Pd nanoparticles; catalyst deactivation; hydrogen storage
资金
- Royal Society [UF140207]
- Royal Society through the Grand Challenge Research Fund [CHG\R1\170092]
We investigate the continuous generation of hydrogen via the low temperature (<110 degrees C), additive-free dehydrogenation of formic acid over heterogeneous Pd/C. Through a combination of kinetic (batch and continuous), spectroscopic, and mechanistic studies, we develop structure activity lifetime relationships for this process and in doing so reveal that a combination of pore fouling and poisoning by formate ions results in deactivation of the catalyst during continuous operation. Although these factors result in extensive deactivation in Plug Flow mode, promising results can be obtained by minimizing the steady state concentration of formic acid by operating in a continuous stirred tank reactor. In doing so, continuous operation of the system without a loss of activity for over 2500 turnovers is achieved, under mild conditions and in the absence of stoichiometric additives.
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