Immobilization of laccase on solid supports significantly enhances its stability towards denaturation under operating conditions and allows for continuous processing but, at the same time, results in low productivities owing to the large percentage of non-catalytic mass in the catalyst.
Then, the impacts of four structural factors (wall thickness, mean pore size, porosity and channel width) and five operating factors (exhaust flow rate, exhaust oxygen concentration, microwave power, catalytic additive mass concentration and deposited ash mass) on DPF's performance deterioration are evaluated by fuzzy membership grades and Euclidean grey relational grades, respectively.
In homogeneous catalytic reaction, mass transfer effect is considered as negligible because reactant (glucose) and catalysts are in one phase while in heterogeneous, both are in different phases.
At low overpotentials, the catalytic activity per mass of Pt obtained from mass-transport corrected Tafel plots for the 20 wt.% Pt Co/C materials with lower Co contents are close that of the standard 20 wt.% Pt/C catalyst.
Electrochemical data based on CV, RDE, and single-cell PEMFC measurement show that Pd80Ni20 heated at 500 °C has the highest mass catalytic activity for ORR among the Pd-Ni samples investigated, with stability and catalytic activity significantly higher than that found with Pd.
Ru generally showed higher catalytic activity per mass of catalyst metal than Ni.
To further confirm the intermediate and the catalytic pathway, the mass of BPA and 1,4-benzoquinone in the solution phase and adsorbed by PCN-222 were monitored with different irradiation time, respectively (Figure S8).
Consequently, electrocatalysis finishes the process by producing products on the surface (5: catalytic efficiency, 6: mass transfer of reactants and products).
The proteins can be engineered for altered substrate specificity/selectivity, increased catalytic activity, reduced mass transfer limitations through specific protein localization, and reduced substrate/product inhibition.
This design of the high performance sensor, together with the simple and fast MEMS-compatible fabrication process enables such catalytic sensors for mass production and combustible gas detecting in harsh environmental applications.
