The sun produces energy and helium from hydrogen by nuclear fusion. The picture shows the proton-proton-cycle 天文學 天體物理學 試用版 Pp 週期
A platinum/ruthenium catalyst supported on carbon. Often used in direct methanol fuel cells to oxidize methanol 催化劑 dmfc 直接 PtRu 催化劑在碳上受支援
A schematic of the classic Grove gas battery. A series of fuel cells consuming hydrogen and oxygen are used to produce hydrogen and oxygen in a single electrolyzer 格羅夫 電池 電極 格羅夫氣電池
