Developing strategies for preparing high-quality atomically thin two-dimensional (2D) nanomaterials is still an unaccomplished goal. Here we demonstrate that the major pigment used in natural photosynthesis, chlorophyll extracts, can effectively exfoliate bulk graphite, molybdenum dichalcogenides (MoS₂) and boron nitride (h-BN) to form high quality thin sheets. The exfoliated MoS₂ thin sheets were mixed with high-conducting single-walled carbon nanotubes (SWCNTs) and high surface/bulk ratio Pt nanoparticles (PtNPs) to form flexible MoS₂/PtNPs/SWCNT papers for enhanced hydrogen evolution reaction (HER). Detailed electrochemical characterization shows that the flexible MoS₂/PtNPs/SWCNT electrode (0.03 at% or 0.26 wt% Pt) exhibited excellent electrocatalytic activity toward the HER with an ultra-high exchange current density of 0.71 mA cm⁻² which is identical to that of bulk platinum (Pt), “the gold standard” for hydrogen production, an ultra-low onset potential of −11 mV, a Tafel slope of 38 mV dec⁻¹ and over 100 h of electrochemical durability.

中文翻译：

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叶绿素提取物可扩展合成二维纳米片材料：增强氢释放反应

开发用于制备高质量原子薄的二维（2D）纳米材料的策略仍未实现。在这里，我们证明了用于自然光合作用的主要颜料叶绿素提取物可以有效地剥落块状石墨，二硫化钼（MoS ₂）和氮化硼（h-BN），以形成高质量的薄片。将剥离的MoS ₂薄片与高导电单壁碳纳米管（SWCNT）和高表面/体积比Pt纳米颗粒（PtNPs）混合，以形成用于增强氢释放反应（HER）的柔性MoS ₂ / PtNPs / SWCNT纸。详细的电化学表征表明，柔性MoS ₂/ PtNPs / SWCNT电极（0.03 at％或0.26 wt％Pt）对HER表现出优异的电催化活性，具有0.71 mA cm ^-2的超高交换电流密度，与块状铂（Pt）相同。氢气生产的“金标准”，-11伏特的超低启动电位，38伏特的^-1的塔菲尔斜率和超过100小时的电化学耐久性。