Development of Structure-specific Energy Materials Using Hetero-structured Nanoparticles

通过对Pd/γ-Fe 2 O3异质结构纳米颗粒（NPs）和纯Pd NPs进行退火处理，制备了具有不同硬/软体积分数的L10-FePd/α-Fe纳米复合磁体。通过在773 K下退火形成的硬/软体积比为82/18的样品具有最大的最大能量积（10.3 MGOe）。发现八面体形状的形成进一步增加磁性。至于在可见光下用于整体水裂解的光催化剂，当尺寸调节的Rh NP被应用于用作光催化剂（GaN和ZnO的固溶体）中的助催化剂时，证明了较小的Rh核比较大的Rh核给出更高的活性。然后，将CoxMn 3-xO 4复合氧化物纳米粒子作为一种新型的光催化水氧化助催化剂进行了研究。负载CoxMn 3-xO 4 NPs的光催化剂对总水分解的光催化活性是没有CoxMn 3-xO 4 NPs的光催化剂的2.6倍。

L10-FePd/alpha-Fe nanocomposite magnets with various hard/soft volume fractions were formed by annealing Pd/gamma-Fe2O3 heterostructured nanoparticles (NPs) and pure Pd NPs. The sample with a hard/soft volume ratio of 82/18 formed by annealing at 773 K had the largest maximum energy product (10.3 MGOe). The formation of an octahedral shape was found to further increase the magnetic properties. As for the photocatalysts for overall water splitting under visible light, when the size tuned Rh NPs were applied for use as cocatalysts in a photocatalyst (solid solution of GaN and ZnO), it was demonstrated that smaller Rh cores gave higher activity than the larger ones. Then, the CoxMn3-xO4 mixed oxide NPs were studied as a new cocatalyst for photocatalytic water oxidation. The photocatalytic activity of the CoxMn3-xO4 NPs-loaded photocatalyst for overall water splitting was 2.6 times higher than that without the CoxMn3-xO4 NPs.