利用水气联合雾化方法制备铜粉，考察了不同水雾化压力（20、35、68、87、99 MPa）对粉末粒度、化学成分、氧含量、形貌、安息角的影响。结果发现，在铜熔液加热到1 300℃,保温30 min,气雾化压力2 MPa,水雾化压力99 MPa的条件下，得到的铜粉球形度最高，氧含量最低、粒度分布范围最小、粉末在50μm以下的铜粉收得率达到80%以上。

Nanosized tungsten carbide (WC)/carbon (C) catalyst was synthesized via a novel ultra-rapid confinement combustion synthesis method. The amount of activated carbon (AC) plays an important role in the morphology and structure, controlling both the precursor and final powder. The WC particles synthesized inside the pores of the AC had been 10–20 nm because of the confinement of the pore structure and the large specific surface area of AC. When used for oxygen reduction performance, the half-wave potential was −0.24 V, and the electron transfer number was 3.45, indicating the main reaction process was the transfer of four electrons. The detailed electrocatalytic performance and underlying mechanism were investigated in this work. Our study provides a novel approach for the design of catalysts with new compositions and new structures, which are significant for promoting the commercialization of fuel cells.

Triple-conducting cathodes (H+/O2-/e(-)) have attracted more and more interest because they have great responsibility for lowering operating temperature and driving the commercial application of protonic ceramic fuel cells. In this paper, the heterostructure triple-conducting cathode with the pseudo-cubic phase SrFe0.9Nb0.1O3-delta as the core and the tetragonal phase Sr3Fe1.8Nb0.2O7-delta as the shell was in situ synthesized by surface cladding mixed ionic and electronic conductor SrFe0.9Nb0.1O3-delta powders with Sr(NO3)(2). Then, an electronic conducting relaxation method was implored to characterize the proton uptake ability of the shell layer SFN327. The synergistic effects of the heterostructure region and proton conductivity of the shell layer SFN327 make the core-shell structure SFN113@327 show superior electrochemical performance compared with the parent SFN113 as the electrode. The results of the electrochemical performance test of the symmetric cell and the single cell both verified the above mentioned. This paper mainly presents a new idea to prepare the electrode materials for protonic ceramic fuel cells.