RuCu bimetallic catalyst on N-doped mesoporous carbon for high-performance CO2 methanation

In situ formed catalysts for active, durable, and thermally stable ammonia protonic ceramic fuel cells at 550 °C

“…This may be because the use of the RCN anode not only accelerates the two processes of the charge transfer and surface exchange but also has a positive effect on the other mass transfer process, demonstrating that the RCN anode has greater catalytic activity than the monometallic active phases due to surface electrical structure modification coupled with the optimized surface morphology. 34 Although obtaining high catalyst activity is crucial, robust stability may play an even more critical role in practical applications; thus, we investigated the R p stability of RCN, RuNi x , and bare anodes in NH 3 at 550 °C. As shown in Fig.…”

“…The RCN catalysts are selected as novel high-performance ammonia decomposition catalysts because of the potential synergistic effect of Ru and Cu in RCN catalysts; they showed comparable or better catalytic activity than the monometallic active phases. [32][33][34][35][36][37] The RCN-decorated Ni-BZCYYb anode (the RCN anode) achieved a high NH 3 conversion rate of 98% at 550 1C (vs. 46% for the bare anode). The symmetrical anode cells with the RCN anode demonstrated low area-specific resistance (ASR), high stability, and thermal cycle reliability under NH 3 .…”

An Outlook on the Applications of Ru-Based Nanocatalysts for CO2 Hydrogenation to CO and CH4

“…This is confirmed through the HRTEM and EDX data displayed in Figure 9. Sun et al 68 considered a bimetallic Ru−Cu catalyst for CO 2 methanation, though they did not extensively consider the synergy between N-CNS and Ru in promoting CO 2 hydrogenation, finding instead that adding Ru to Cu promotes CO 2 conversion from 15 to up to 80% at 700 °C (60% CO selectivity), especially from the confirmed high active metal dispersion over the N-CNS support. Utilizing a MOF or MDC structure would depend on whether CO or CH 4 is the desired product, as MDC structures are much more temperature-resistant.…”

“…CNS is a another possible support material for this system, though they have hardly been studied for CO 2 hydrogenation , but, instead, for CO hydrogenation. , Research has thus far indicated that production of CNT and CNF requires a catalyst as part of the synthesis process that cannot be fully removed by acid treatment afterward, while the use of a catalyst is avoided altogether when synthesizing CNS . The most common method is the Stöber method, where a carbon precursor is dissolved in an alcohol/water medium before adding ammonium to polymerize the carbon into a spherical structure. , Additionally, CNS has strong electrical conductivity (which can promote electron transfer and adsorb intermediates), its surface area ranges from <2 m 2 g –1 to >1200 m 2 g –1 , and the spherical structure results in a much higher surface to volume ratio to thereby reduce any restrictions in gas diffusion within a porous CNS network .…”

“…CNS is a another possible support material for this system, though they have hardly been studied for CO 2 hydrogenation 68,104 but, instead, for CO hydrogenation. 104,148 Research has thus far indicated that production of CNT and CNF requires a catalyst as part of the synthesis process that cannot be fully removed by acid treatment afterward, while the use of a catalyst is avoided altogether when synthesizing CNS.…”